array:24 [
  "pii" => "S2341287915002148"
  "issn" => "23412879"
  "doi" => "10.1016/j.anpede.2015.10.015"
  "estado" => "S300"
  "fechaPublicacion" => "2016-02-01"
  "aid" => "1867"
  "copyright" => "Asociación Española de Pediatría"
  "copyrightAnyo" => "2014"
  "documento" => "article"
  "crossmark" => 1
  "subdocumento" => "fla"
  "cita" => "An Pediatr (Barc). 2016;84:85-91"
  "abierto" => array:3 [
    "ES" => false
    "ES2" => false
    "LATM" => false
  ]
  "gratuito" => false
  "lecturas" => array:2 [
    "total" => 1974
    "formatos" => array:3 [
      "EPUB" => 139
      "HTML" => 1363
      "PDF" => 472
    ]
  ]
  "Traduccion" => array:1 [
    "es" => array:19 [
      "pii" => "S1695403315001472"
      "issn" => "16954033"
      "doi" => "10.1016/j.anpedi.2015.04.008"
      "estado" => "S300"
      "fechaPublicacion" => "2016-02-01"
      "aid" => "1867"
      "copyright" => "Asociación Española de Pediatría"
      "documento" => "article"
      "crossmark" => 1
      "subdocumento" => "fla"
      "cita" => "An Pediatr (Barc). 2016;84:85-91"
      "abierto" => array:3 [
        "ES" => false
        "ES2" => false
        "LATM" => false
      ]
      "gratuito" => false
      "lecturas" => array:2 [
        "total" => 5875
        "formatos" => array:3 [
          "EPUB" => 136
          "HTML" => 4785
          "PDF" => 954
        ]
      ]
      "es" => array:12 [
        "idiomaDefecto" => true
        "cabecera" => "<span class="elsevierStyleTextfn">ORIGINAL</span>"
        "titulo" => "Revisi&#243;n de los pacientes estudiados por coagulopat&#237;a en una unidad de Oncohematolog&#237;a"
        "tienePdf" => "es"
        "tieneTextoCompleto" => "es"
        "tieneResumen" => array:2 [
          0 => "es"
          1 => "en"
        ]
        "paginas" => array:1 [
          0 => array:2 [
            "paginaInicial" => "85"
            "paginaFinal" => "91"
          ]
        ]
        "titulosAlternativos" => array:1 [
          "en" => array:1 [
            "titulo" => "Review of patients studied for coagulopathy in a Hematology&#47;Oncology unit"
          ]
        ]
        "contieneResumen" => array:2 [
          "es" => true
          "en" => true
        ]
        "contieneTextoCompleto" => array:1 [
          "es" => true
        ]
        "contienePdf" => array:1 [
          "es" => true
        ]
        "autores" => array:1 [
          0 => array:2 [
            "autoresLista" => "I&#46; Romero, N&#46; Conde, D&#46; Garc&#237;a Aldana, A&#46; Ruano, A&#46; Fern&#225;ndez-Teijeiro"
            "autores" => array:5 [
              0 => array:2 [
                "nombre" => "I&#46;"
                "apellidos" => "Romero"
              ]
              1 => array:2 [
                "nombre" => "N&#46;"
                "apellidos" => "Conde"
              ]
              2 => array:2 [
                "nombre" => "D&#46;"
                "apellidos" => "Garc&#237;a Aldana"
              ]
              3 => array:2 [
                "nombre" => "A&#46;"
                "apellidos" => "Ruano"
              ]
              4 => array:2 [
                "nombre" => "A&#46;"
                "apellidos" => "Fern&#225;ndez-Teijeiro"
              ]
            ]
          ]
        ]
      ]
      "idiomaDefecto" => "es"
      "Traduccion" => array:1 [
        "en" => array:9 [
          "pii" => "S2341287915002148"
          "doi" => "10.1016/j.anpede.2015.10.015"
          "estado" => "S300"
          "subdocumento" => ""
          "abierto" => array:3 [
            "ES" => false
            "ES2" => false
            "LATM" => false
          ]
          "gratuito" => false
          "lecturas" => array:1 [
            "total" => 0
          ]
          "idiomaDefecto" => "en"
          "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2341287915002148?idApp=UINPBA00005H"
        ]
      ]
      "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1695403315001472?idApp=UINPBA00005H"
      "url" => "/16954033/0000008400000002/v1_201601280025/S1695403315001472/v1_201601280025/es/main.assets"
    ]
  ]
  "itemSiguiente" => array:19 [
    "pii" => "S2341287915002136"
    "issn" => "23412879"
    "doi" => "10.1016/j.anpede.2015.10.014"
    "estado" => "S300"
    "fechaPublicacion" => "2016-02-01"
    "aid" => "1866"
    "copyright" => "Asociaci&#243;n Espa&#241;ola de Pediatr&#237;a"
    "documento" => "article"
    "crossmark" => 1
    "subdocumento" => "fla"
    "cita" => "An Pediatr &#40;Barc&#41;. 2016;84:92-6"
    "abierto" => array:3 [
      "ES" => false
      "ES2" => false
      "LATM" => false
    ]
    "gratuito" => false
    "lecturas" => array:2 [
      "total" => 2710
      "formatos" => array:3 [
        "EPUB" => 144
        "HTML" => 1938
        "PDF" => 628
      ]
    ]
    "en" => array:13 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
      "titulo" => "Combination of pulsed dye laser and propranolol in the treatment of ulcerated infantile haemangioma"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => array:2 [
        0 => "en"
        1 => "es"
      ]
      "paginas" => array:1 [
        0 => array:2 [
          "paginaInicial" => "92"
          "paginaFinal" => "96"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "es" => array:1 [
          "titulo" => "Combinaci&#243;n de propranolol oral y l&#225;ser de colorante pulsado en el tratamiento de los hemangiomas infantiles ulcerados"
        ]
      ]
      "contieneResumen" => array:2 [
        "en" => true
        "es" => true
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "resumenGrafico" => array:2 [
        "original" => 0
        "multimedia" => array:7 [
          "identificador" => "fig0005"
          "etiqueta" => "Figure 1"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr1.jpeg"
              "Alto" => 676
              "Ancho" => 900
              "Tamanyo" => 97264
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Patient with ulcerated haemangioma in the nappy area&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "M&#46; Rodr&#237;guez-Ruiz, M&#46;G&#46; Tellado, J&#46; del Pozo Losada"
          "autores" => array:3 [
            0 => array:2 [
              "nombre" => "M&#46;"
              "apellidos" => "Rodr&#237;guez-Ruiz"
            ]
            1 => array:2 [
              "nombre" => "M&#46;G&#46;"
              "apellidos" => "Tellado"
            ]
            2 => array:2 [
              "nombre" => "J&#46;"
              "apellidos" => "del Pozo Losada"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "Traduccion" => array:1 [
      "es" => array:9 [
        "pii" => "S1695403315001460"
        "doi" => "10.1016/j.anpedi.2015.04.007"
        "estado" => "S300"
        "subdocumento" => ""
        "abierto" => array:3 [
          "ES" => false
          "ES2" => false
          "LATM" => false
        ]
        "gratuito" => false
        "lecturas" => array:1 [
          "total" => 0
        ]
        "idiomaDefecto" => "es"
        "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1695403315001460?idApp=UINPBA00005H"
      ]
    ]
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2341287915002136?idApp=UINPBA00005H"
    "url" => "/23412879/0000008400000002/v1_201601300058/S2341287915002136/v1_201601300058/en/main.assets"
  ]
  "itemAnterior" => array:19 [
    "pii" => "S2341287915002112"
    "issn" => "23412879"
    "doi" => "10.1016/j.anpede.2015.10.012"
    "estado" => "S300"
    "fechaPublicacion" => "2016-02-01"
    "aid" => "1872"
    "copyright" => "Asociaci&#243;n Espa&#241;ola de Pediatr&#237;a"
    "documento" => "article"
    "crossmark" => 1
    "subdocumento" => "fla"
    "cita" => "An Pediatr &#40;Barc&#41;. 2016;84:79-84"
    "abierto" => array:3 [
      "ES" => false
      "ES2" => false
      "LATM" => false
    ]
    "gratuito" => false
    "lecturas" => array:2 [
      "total" => 2600
      "formatos" => array:3 [
        "EPUB" => 174
        "HTML" => 1679
        "PDF" => 747
      ]
    ]
    "en" => array:13 [
      "idiomaDefecto" => true
      "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
      "titulo" => "Surfactant replacement therapy with a minimally invasive technique&#58; Experience in a tertiary hospital"
      "tienePdf" => "en"
      "tieneTextoCompleto" => "en"
      "tieneResumen" => array:2 [
        0 => "en"
        1 => "es"
      ]
      "paginas" => array:1 [
        0 => array:2 [
          "paginaInicial" => "79"
          "paginaFinal" => "84"
        ]
      ]
      "titulosAlternativos" => array:1 [
        "es" => array:1 [
          "titulo" => "Terapia con surfactante con t&#233;cnica m&#237;nimamente invasiva&#58; experiencia en un hospital terciario"
        ]
      ]
      "contieneResumen" => array:2 [
        "en" => true
        "es" => true
      ]
      "contieneTextoCompleto" => array:1 [
        "en" => true
      ]
      "contienePdf" => array:1 [
        "en" => true
      ]
      "resumenGrafico" => array:2 [
        "original" => 0
        "multimedia" => array:7 [
          "identificador" => "fig0005"
          "etiqueta" => "Figure 1"
          "tipo" => "MULTIMEDIAFIGURA"
          "mostrarFloat" => true
          "mostrarDisplay" => false
          "figura" => array:1 [
            0 => array:4 [
              "imagen" => "gr1.jpeg"
              "Alto" => 800
              "Ancho" => 1678
              "Tamanyo" => 80489
            ]
          ]
          "descripcion" => array:1 [
            "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Evolution of FiO<span class="elsevierStyleInf">2</span> showing median time of start of surfactant administration in both groups&#59; there is a delay in the control group&#46;</p>"
          ]
        ]
      ]
      "autores" => array:1 [
        0 => array:2 [
          "autoresLista" => "F&#46;J&#46; Canals Candela, C&#46; Vizca&#237;no D&#237;az, M&#46;J&#46; Ferr&#225;ndez Berenguer, M&#46;I&#46; Serrano Robles, C&#46; V&#225;zquez Gomis, J&#46;L&#46; Quiles Dur&#225;"
          "autores" => array:6 [
            0 => array:2 [
              "nombre" => "F&#46;J&#46;"
              "apellidos" => "Canals Candela"
            ]
            1 => array:2 [
              "nombre" => "C&#46;"
              "apellidos" => "Vizca&#237;no D&#237;az"
            ]
            2 => array:2 [
              "nombre" => "M&#46;J&#46;"
              "apellidos" => "Ferr&#225;ndez Berenguer"
            ]
            3 => array:2 [
              "nombre" => "M&#46;I&#46;"
              "apellidos" => "Serrano Robles"
            ]
            4 => array:2 [
              "nombre" => "C&#46;"
              "apellidos" => "V&#225;zquez Gomis"
            ]
            5 => array:2 [
              "nombre" => "J&#46;L&#46;"
              "apellidos" => "Quiles Dur&#225;"
            ]
          ]
        ]
      ]
    ]
    "idiomaDefecto" => "en"
    "Traduccion" => array:1 [
      "es" => array:9 [
        "pii" => "S1695403315002040"
        "doi" => "10.1016/j.anpedi.2015.04.013"
        "estado" => "S300"
        "subdocumento" => ""
        "abierto" => array:3 [
          "ES" => false
          "ES2" => false
          "LATM" => false
        ]
        "gratuito" => false
        "lecturas" => array:1 [
          "total" => 0
        ]
        "idiomaDefecto" => "es"
        "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S1695403315002040?idApp=UINPBA00005H"
      ]
    ]
    "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2341287915002112?idApp=UINPBA00005H"
    "url" => "/23412879/0000008400000002/v1_201601300058/S2341287915002112/v1_201601300058/en/main.assets"
  ]
  "en" => array:19 [
    "idiomaDefecto" => true
    "cabecera" => "<span class="elsevierStyleTextfn">Original Article</span>"
    "titulo" => "Review of patients studied for coagulopathy in a haematology&#47;oncology unit"
    "tieneTextoCompleto" => true
    "paginas" => array:1 [
      0 => array:2 [
        "paginaInicial" => "85"
        "paginaFinal" => "91"
      ]
    ]
    "autores" => array:1 [
      0 => array:4 [
        "autoresLista" => "I&#46; Romero, N&#46; Conde, D&#46;G&#46; Aldana, A&#46; Ruano, A&#46; Fern&#225;ndez-Teijeiro"
        "autores" => array:5 [
          0 => array:3 [
            "nombre" => "I&#46;"
            "apellidos" => "Romero"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
            ]
          ]
          1 => array:4 [
            "nombre" => "N&#46;"
            "apellidos" => "Conde"
            "email" => array:1 [
              0 => "nuriaconde&#64;hotmail&#46;com"
            ]
            "referencia" => array:2 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
              1 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">&#42;</span>"
                "identificador" => "cor0005"
              ]
            ]
          ]
          2 => array:3 [
            "nombre" => "D&#46;G&#46;"
            "apellidos" => "Aldana"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
            ]
          ]
          3 => array:3 [
            "nombre" => "A&#46;"
            "apellidos" => "Ruano"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">b</span>"
                "identificador" => "aff0010"
              ]
            ]
          ]
          4 => array:3 [
            "nombre" => "A&#46;"
            "apellidos" => "Fern&#225;ndez-Teijeiro"
            "referencia" => array:1 [
              0 => array:2 [
                "etiqueta" => "<span class="elsevierStyleSup">a</span>"
                "identificador" => "aff0005"
              ]
            ]
          ]
        ]
        "afiliaciones" => array:2 [
          0 => array:3 [
            "entidad" => "Unidad de Onco-Hematolog&#237;a Pedi&#225;trica&#44; Hospital Universitario Virgen Macarena&#44; Unidad de Gesti&#243;n Cl&#237;nica Intercentros de Oncolog&#237;a Pedi&#225;trica&#44; Hospitales Universitarios Virgen Macarena y Virgen del Roc&#237;o&#44; Sevilla&#44; Spain"
            "etiqueta" => "a"
            "identificador" => "aff0005"
          ]
          1 => array:3 [
            "entidad" => "Secci&#243;n de Trombolog&#237;a&#44; Hospital Universitario Virgen Macarena&#44; Unidad de Gesti&#243;n Cl&#237;nica Intercentros de Hematolog&#237;a&#44; Hospitales Universitarios Virgen Macarena y Virgen del Roc&#237;o&#44; Sevilla&#44; Spain"
            "etiqueta" => "b"
            "identificador" => "aff0010"
          ]
        ]
        "correspondencia" => array:1 [
          0 => array:3 [
            "identificador" => "cor0005"
            "etiqueta" => "&#8270;"
            "correspondencia" => "Corresponding author&#46;"
          ]
        ]
      ]
    ]
    "titulosAlternativos" => array:1 [
      "es" => array:1 [
        "titulo" => "Revisi&#243;n de los pacientes estudiados por coagulopat&#237;a en una unidad de Oncohematolog&#237;a"
      ]
    ]
    "textoCompleto" => "<span class="elsevierStyleSections"><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0065">Introduction</span><p id="par0005" class="elsevierStylePara elsevierViewall">Coagulopathy-indicative signs are a frequent reason for consultation in haematology&#46; Its diagnosis can be difficult&#44; due to specific bleeding age patterns&#58; epistaxis &#40;39&#37;&#41; and easy bruising &#40;24&#37;&#41; are common without any haemorrhagic disorder&#46; However&#44; these can be the only clinical symptoms in children with coagulopathies who have not undergone any haemostatic challenge&#46;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">1</span></a></p><p id="par0010" class="elsevierStylePara elsevierViewall">In addition&#44; differential bleeding&#47;bruising diagnosis in children includes other entities&#44; such as platelet alterations&#44; vasculopathies and abuse&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Among hereditary coagulopathies&#44; the most frequent is von Willebrand disease &#40;vWD&#41;&#44; which has a prevalence of approximately 1&#37;&#44; according to studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0145"><span class="elsevierStyleSup">2&#44;3</span></a> More recent studies&#44; however&#44; have reported a 0&#46;1&#37; prevalence of clinically symptomatic vWD in children&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">4</span></a> This is followed by factor <span class="elsevierStyleSmallCaps">viii</span> &#40;haemophilia A&#41; and factor <span class="elsevierStyleSmallCaps">ix</span> &#40;haemophilia B&#41; deficiency&#44; with a predominance of 1&#58;5000 males and 1&#58;30&#44;000 males&#44; respectively&#46;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">5</span></a></p><p id="par0020" class="elsevierStylePara elsevierViewall">Some factor deficiencies do not result in bleeding&#44; such as the deficiency of some contact factors&#58; high molecular weight kininogen &#40;HMWK&#41;&#44; prekallikrein and factor <span class="elsevierStyleSmallCaps">xii</span>&#46; These factors are not involved in the propagation phase of the coagulation cascade and&#44; therefore&#44; their deficiency&#44; in spite of prolonging the activated partial thromboplastin time &#40;APTT&#41; <span class="elsevierStyleItalic">in vitro</span>&#44; is not associated with bleeding <span class="elsevierStyleItalic">in vivo</span>&#46;<a class="elsevierStyleCrossRef" href="#bib0165"><span class="elsevierStyleSup">6</span></a></p><p id="par0025" class="elsevierStylePara elsevierViewall">In this study&#44; we set out to determine which services refer the greatest number of patients for coagulation analysis and the reason for referral&#44; to correlate laboratory findings with clinical symptoms of bleeding&#44; and to determine the most common diagnoses made in our hospital&#46; Greater insight into these patients will help improve diagnosis protocols&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0070">Patients and methods</span><p id="par0030" class="elsevierStylePara elsevierViewall">Retrospective descriptive analysis of children under study due to suspected coagulopathy at the paediatric oncohaematology unit of the Virgen Macarena University Hospital &#40;UH&#41; in Seville in 2012&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">At this unit&#44; in 2012&#44; all paediatric solid&#47;haematological tumours &#40;except for brain tumours&#41; and non-oncologic haematology disorders were studied and treated&#46; Patients diagnosed with haemophilia A or B were referred to the Haemophilia Unit from the Rocio UH in Seville after diagnosis&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">There were 20 new oncology patients in 2012&#44; and 120 haematological patients&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">Clinical treatment was given by paediatric haematologists and laboratory techniques by haematologists&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">We have taken into consideration children with altered coagulation times&#44; those with normal coagulation and bleeding times &#40;after ruling out thrombocytopenia&#41;&#44; and those studied due to having a family member with a hereditary coagulopathy&#46; A total of 52 children were studied&#46; Of these&#44; 5 were oncology patients undergoing active treatment and were excluded due to the potential interactions between chemotherapy and the underlying disease&#46;</p><p id="par0055" class="elsevierStylePara elsevierViewall">The other 47 children were ultimately selected&#46;</p><p id="par0060" class="elsevierStylePara elsevierViewall">The diagnosis of coagulopathy was based on a factor plasma level of less than 45&#37;&#44; and in the case of vWD1&#44; on a ristocetin co-factor of less than 45&#37;&#44; and a relevant clinical&#47;family history &#40;FH&#41;&#46;</p><p id="par0065" class="elsevierStylePara elsevierViewall">Factor <span class="elsevierStyleSmallCaps">xii</span>&#44; prekallikrein and HMWK deficiencies were considered as having no real risk of bleeding&#46;</p><p id="par0070" class="elsevierStylePara elsevierViewall">The following variables were collected&#58; age&#44; gender&#44; service making the referral&#44; reason for the referral&#44; FH of coagulopathy&#47;bleeding&#44; presence and origin of previous clinical symptoms of bleeding&#44; number of blood tests performed and final diagnosis&#46;</p><p id="par0075" class="elsevierStylePara elsevierViewall">A positive family history was taken into consideration if there was significant cutaneous and&#47;or mucous bleeding in a first-degree family member&#46; No standardised bleeding questionnaires were used&#46;</p><p id="par0080" class="elsevierStylePara elsevierViewall">All the data that were obtained and considered as study variables were stored and analysed with the statistical software package SPSS<span class="elsevierStyleSup">&#174;</span> v&#46;15&#46;0 &#40;SPSS Inc&#46;&#44; Chicago&#44; IL&#44; USA&#41;&#46;</p><p id="par0085" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Descriptive statistical analysis&#58;</span> qualitative variables are expressed as absolute frequencies and percentages&#46; Quantitative variables as mean&#44; median and range&#46;</p><p id="par0090" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Analytical statistical analysis&#58;</span> Fisher&#39;s exact test was used to compare the frequencies of 2 qualitative variables&#44; the chi-square goodness of fit test was used to compare frequencies of the same qualitative variable&#44; and Pearson&#39;s Chi-square test was used to analyse the association between 2 qualitative variables&#46; A value of <span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#60;<span class="elsevierStyleHsp" style=""></span>0&#46;05 was considered significant&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0075">Results</span><p id="par0095" class="elsevierStylePara elsevierViewall">Data from 47 children were collected&#58; 28 boys &#40;59&#46;6&#37;&#41; and 19 girls &#40;40&#46;4&#37;&#41;&#46;</p><p id="par0100" class="elsevierStylePara elsevierViewall">The mean age at the first visit was 6&#46;1 years &#40;median&#58; 6 years&#59; interval&#58; 1 month-13 years&#41;&#46;</p><p id="par0105" class="elsevierStylePara elsevierViewall">Patients&#8217; origin is shown in <a class="elsevierStyleCrossRef" href="#tbl0005">Table 1</a>&#46;</p><elsevierMultimedia ident="tbl0005"></elsevierMultimedia><p id="par0110" class="elsevierStylePara elsevierViewall">A confirmatory diagnosis was based on the mean of 2 blood tests &#40;median&#58; 2&#59; interval&#58; 1&#8211;5&#41;&#46;</p><p id="par0115" class="elsevierStylePara elsevierViewall">Haemorrhagic clinical symptoms and diagnoses&#58;<ul class="elsevierStyleList" id="lis0005"><li class="elsevierStyleListItem" id="lsti0005"><span class="elsevierStyleLabel">&#8226;</span><p id="par0120" class="elsevierStylePara elsevierViewall">Eighteen of the 47 patients &#40;38&#46;3&#37;&#41; had a history of bleeding&#44; mainly epistaxis &#40;12 children&#44; 66&#46;6&#37;&#41;&#46;</p></li><li class="elsevierStyleListItem" id="lsti0010"><span class="elsevierStyleLabel">&#8226;</span><p id="par0125" class="elsevierStylePara elsevierViewall">No diagnosis was possible in 1 study patient who did not return for subsequent appointments&#46; Final diagnoses&#44; presence&#47;absence of bleeding and statistically significant differences between bleeding&#47;no bleeding are summarised in <a class="elsevierStyleCrossRef" href="#tbl0010">Table 2</a>&#46;</p><elsevierMultimedia ident="tbl0010"></elsevierMultimedia></li></ul></p><p id="par0130" class="elsevierStylePara elsevierViewall">FH of bleeding&#58;<ul class="elsevierStyleList" id="lis0010"><li class="elsevierStyleListItem" id="lsti0015"><span class="elsevierStyleLabel">&#8226;</span><p id="par0135" class="elsevierStylePara elsevierViewall">Two patients were adopted and these data could not be gathered&#46;</p></li><li class="elsevierStyleListItem" id="lsti0020"><span class="elsevierStyleLabel">&#8226;</span><p id="par0140" class="elsevierStylePara elsevierViewall"><a class="elsevierStyleCrossRef" href="#tbl0015">Table 3</a> summarises the presence&#47;absence of an FH of bleeding according to final diagnosis&#46; FH of bleeding is more uncommon in children diagnosed with coagulopathy with no real risk of bleeding &#40;<span class="elsevierStyleItalic">p</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>0&#46;029&#41;&#46;</p><elsevierMultimedia ident="tbl0015"></elsevierMultimedia></li></ul></p><p id="par0145" class="elsevierStylePara elsevierViewall">Reason for referral&#58;<ul class="elsevierStyleList" id="lis0015"><li class="elsevierStyleListItem" id="lsti0025"><span class="elsevierStyleLabel">&#8226;</span><p id="par0150" class="elsevierStylePara elsevierViewall">This is summarised in <a class="elsevierStyleCrossRef" href="#tbl0020">Table 4</a>&#46;</p><elsevierMultimedia ident="tbl0020"></elsevierMultimedia></li></ul></p><p id="par0155" class="elsevierStylePara elsevierViewall">Analysis per group is as follows&#58;<ul class="elsevierStyleList" id="lis0020"><li class="elsevierStyleListItem" id="lsti0030"><span class="elsevierStyleLabel">-</span><p id="par0160" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Prolonged APTT with no bleeding&#58;</span> 20 children&#46; The final diagnosis was&#58; 8 &#40;40&#37;&#41; healthy children&#44; 6 &#40;30&#37;&#41; with factor <span class="elsevierStyleSmallCaps">xii</span> deficiency &#40;one of whom was diagnosed with lupus anticoagulant within a context of sepsis&#41;&#44; 3 &#40;15&#37;&#41; with vWD1&#44; 1 &#40;5&#37;&#41; with factor <span class="elsevierStyleSmallCaps">xi</span> deficiency&#44; another &#40;5&#37;&#41; with deficiency of other contact factors &#40;HMWK&#44; prekallikrein&#41; and lastly&#44; 1 &#40;5&#37;&#41; with factor <span class="elsevierStyleSmallCaps">ix</span> deficiency&#46;</p></li><li class="elsevierStyleListItem" id="lsti0035"><span class="elsevierStyleLabel">-</span><p id="par0165" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Prolonged APTT with bleeding&#58;</span> 13 children&#44; although 1 was lost to follow-up&#46; Below is a summary of the type of bleeding and of the final diagnosis&#58;<ul class="elsevierStyleList" id="lis0025"><li class="elsevierStyleListItem" id="lsti0040"><span class="elsevierStyleLabel">&#40;a&#41;</span><p id="par0170" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Epistaxis&#58;</span> 10 &#40;77&#37;&#41;&#46; The final diagnosis was&#58; 5 patients &#40;50&#37;&#41; with vWD1 &#40;1 of whom was diagnosed with lupus anticoagulant&#41;&#59; 2 patients &#40;20&#37;&#41; with factor <span class="elsevierStyleSmallCaps">xii</span> deficiency&#59; 2 &#40;20&#37;&#41; were healthy&#46;</p></li><li class="elsevierStyleListItem" id="lsti0045"><span class="elsevierStyleLabel">&#40;b&#41;</span><p id="par0175" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Haemorrhage at another level&#58;</span> 3 &#40;23&#46;1&#37;&#41;&#46; The final diagnosis was&#58; 2 healthy children &#40;66&#46;7&#37;&#41;&#44; who had been referred due to haematemesis in 1 case and petechiae in the other case&#59; and 1 patient with factor <span class="elsevierStyleSmallCaps">xii</span> deficiency &#40;33&#46;3&#37;&#41;&#46; This patient had presented intraventricular haemorrhage within a prematurity context&#46;</p></li></ul></p></li></ul></p><p id="par0180" class="elsevierStylePara elsevierViewall">Excluding 1 patient that was lost to follow-up and 1 premature infant&#44; 5 &#40;45&#46;5&#37;&#41; of the 11 patients referred due to an altered APTT and bleeding were diagnosed with coagulopathy with a high risk of bleeding&#46; In the group of children with a prolonged APTT with no clinical symptoms of bleeding&#44; 5 out of 20 &#40;25&#37;&#41; were diagnosed with coagulopathy with a high risk of bleeding&#46; These differences&#44; however&#44; are not statistically significant&#46;<ul class="elsevierStyleList" id="lis0030"><li class="elsevierStyleListItem" id="lsti0050"><span class="elsevierStyleLabel">-</span><p id="par0185" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Hereditary haemorrhagic disorder&#58;</span> 10 children&#46; The final diagnoses were&#58;<ul class="elsevierStyleList" id="lis0035"><li class="elsevierStyleListItem" id="lsti0055"><span class="elsevierStyleLabel">&#40;a&#41;</span><p id="par0190" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Healthy&#58;</span> 9 &#40;90&#37;&#41;&#46; Eight with no bleeding and one with occasional epistaxis&#46;</p></li><li class="elsevierStyleListItem" id="lsti0060"><span class="elsevierStyleLabel">&#40;b&#41;</span><p id="par0195" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Factor XI deficiency&#58;</span> 1 patient &#40;10&#37;&#41; with no bleeding&#46;</p></li></ul></p></li><li class="elsevierStyleListItem" id="lsti0065"><span class="elsevierStyleLabel">-</span><p id="par0200" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Bleeding with normal APTT and prothrombin activity &#40;PA&#41;&#58;</span> 1 child was diagnosed with vWD1 after presenting capillary haemorrhage following a phimosis intervention&#46; Another child&#44; who was referred due to epistaxis and haemorrhage after a dental extraction&#44; was not diagnosed with any alteration&#46;</p></li><li class="elsevierStyleListItem" id="lsti0070"><span class="elsevierStyleLabel">-</span><p id="par0205" class="elsevierStylePara elsevierViewall"><span class="elsevierStyleItalic">Bleeding with reduced PA&#58;</span> 1 child with prolonged APTT with clinical symptoms of rectal bleeding was diagnosed with factor <span class="elsevierStyleSmallCaps">x</span> deficiency caused by vitamin K deficiency&#46; In another child with recurrent haematomas&#44; no pathology was diagnosed&#46;</p></li></ul></p></span><span id="sec0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0080">Discussion</span><p id="par0210" class="elsevierStylePara elsevierViewall">The results of the study showed that&#44; in our Paediatric Haematology Unit&#44; most of the children who were referred to rule out coagulopathy were referred due to prolonged APTT with no clinical haemorrhagic symptoms&#44; and that 75&#37; of these and 48&#46;7&#37; of the total of children under study were healthy&#46;</p><p id="par0215" class="elsevierStylePara elsevierViewall">Was the referral justified&#63; Is it necessary to perform coagulation studies in patients with no bleeding history&#63; Our findings show room for improvement in the protocols for referring patients to the Haematology Unit&#46; When should basic coagulation analysis be performed&#63; And which patients with altered times should have further analysis&#63; Referrals from Surgery and Anaesthetics Units&#44; together&#44; represent the most frequent reason for consultation&#58; APTT and PA studies are a part of the preoperative work-up without taking into consideration the patient&#39;s personal history or FH of bleeding&#46;</p><p id="par0220" class="elsevierStylePara elsevierViewall">The <span class="elsevierStyleItalic">American Academy of Otolaryngology-Head and Neck Surgery</span> recommends preoperative coagulation test only if a coagulopathy is suspected based on the patient&#39;s personal or family history&#46;<a class="elsevierStyleCrossRef" href="#bib0170"><span class="elsevierStyleSup">7</span></a> Likewise&#44; the <span class="elsevierStyleItalic">British Committee for Standards in Haematology</span> recommended in 2008 obtaining a complete bleeding history instead of performing universal coagulation screening&#46;<a class="elsevierStyleCrossRef" href="#bib0175"><span class="elsevierStyleSup">8</span></a> Cooper et al&#46; found not performing coagulation tests before amygdalectomy in children to be the most cost-effective strategy&#46;<a class="elsevierStyleCrossRef" href="#bib0180"><span class="elsevierStyleSup">9</span></a> After amygdalectomy&#44; one of the most frequent interventions in children&#44; Zag&#243;lski detected bleeding in several patients with previously normal coagulation tests&#44; and none in patients with a previously altered APTT&#46; These authors emphasise that the incidence of haemorrhage after an amygdalectomy does not increase in patients with a prolonged APTT&#44; and a personal history of recurring epistaxis&#59; haematomas after minor injury and prolonged haemorrhage after minor injuries are better predictors of postoperative bleeding&#46;<a class="elsevierStyleCrossRef" href="#bib0185"><span class="elsevierStyleSup">10</span></a> Hubner concluded that a detailed and supervised history has great predictive value in the diagnosis of coagulopathies&#46; The absence of bleeding predicts that laboratory results will be normal in about 94&#37; of the cases&#46;<a class="elsevierStyleCrossRef" href="#bib0190"><span class="elsevierStyleSup">11</span></a></p><p id="par0225" class="elsevierStylePara elsevierViewall">Nevertheless&#44; how would coagulopathies with no haemorrhage symptoms be diagnosed if no laboratory tests are performed&#63; According to Bowman et al&#46;&#44; the absence of bleeding in a child with vWD can be due to the lack of surgical interventions&#44; dental extractions or menstruation that can provoke haemorrhage&#46;<a class="elsevierStyleCrossRef" href="#bib0155"><span class="elsevierStyleSup">4</span></a> In these cases&#44; FH plays a crucial role in diagnosis&#46; Furthermore&#44; the diagnosis of certain coagulopathies&#44; such as vWD&#44; requires the presence of a positive FH&#46;<a class="elsevierStyleCrossRef" href="#bib0195"><span class="elsevierStyleSup">12</span></a></p><p id="par0230" class="elsevierStylePara elsevierViewall">Our study design is too limited to allow us to draw conclusions on FH of bleeding&#46; We can only state that an FH of bleeding was more common in the group of children diagnosed with coagulopathies and without a high risk of bleeding&#46;</p><p id="par0235" class="elsevierStylePara elsevierViewall">On average&#44; 2 blood tests were performed per patient in our study&#44; a rate consistent with other studies&#46;<a class="elsevierStyleCrossRefs" href="#bib0200"><span class="elsevierStyleSup">13&#44;14</span></a> Due to the fluctuating levels of von Willebrand factor &#40;VWF&#58;Ag&#41;&#44; a repeat test is mandatory&#46;<a class="elsevierStyleCrossRef" href="#bib0200"><span class="elsevierStyleSup">13</span></a> Hyatt et al&#46;&#44; in their revised study on children with vWD1&#44; performed a minimum of 2 blood tests&#46; Particular care is needed when drawing blood for follow-up tests in paediatric patients&#44; due to the risk of secondary stress<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">14</span></a>&#59; it should be borne in mind that stress&#44; crying and anxiety increase vWF&#58;Ag levels&#46;<a class="elsevierStyleCrossRef" href="#bib0210"><span class="elsevierStyleSup">15</span></a> Nevertheless&#44; 2 separate blood tests are needed to confirm diagnosis of vWD&#44; so at least 2 venipunctures must be performed&#46;<a class="elsevierStyleCrossRef" href="#bib0195"><span class="elsevierStyleSup">12</span></a></p><p id="par0240" class="elsevierStylePara elsevierViewall">As for the type of bleeding&#44; it is interesting to note that most children under study never presented with bleeding &#40;61&#46;7&#37;&#41;&#46; Current studies on the diagnosis of coagulopathies recommend a more restrictive approach to coagulopathy analyses to avoid false positives&#46; They recommend adjusting and validating questionnaires on paediatric bleeding&#46; This is crucial to avoid unnecessary studies in healthy children&#46;<a class="elsevierStyleCrossRef" href="#bib0215"><span class="elsevierStyleSup">16</span></a> Another remarkable finding is the existence of bleeding in 30&#46;4&#37; of the children classified as healthy&#46; In this regard&#44; it should be borne in mind that epistaxis and haematomas are common findings in healthy children&#46;<a class="elsevierStyleCrossRef" href="#bib0140"><span class="elsevierStyleSup">1</span></a></p><p id="par0245" class="elsevierStylePara elsevierViewall">Three children diagnosed with vWD1 without bleeding were found&#46; According to the <span class="elsevierStyleItalic">International Society on Thrombosis and Haemostasis</span>&#40;ISTH&#41;&#44; these cases would be classified as potential vWD1&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">17</span></a> As mentioned above&#44; children with vWD1 might not have been subjected to a haemostatic challenge&#44; and this could explain why they did not present with pathological bleeding&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">14</span></a></p><p id="par0250" class="elsevierStylePara elsevierViewall">In our study&#44; 33&#46;3&#37; of children with factor <span class="elsevierStyleSmallCaps">xii</span> deficiency presented bleeding&#46; Our interpretation is the same as in children with bleeding who were diagnosed as healthy&#58; bleeding is frequent in children&#44; regardless of a factor <span class="elsevierStyleSmallCaps">xii</span> deficiency&#46; The only case of haemophilia B did not exhibit bleeding&#44; probably because the level of factor <span class="elsevierStyleSmallCaps">ix</span> was 45&#37;&#46;</p><p id="par0255" class="elsevierStylePara elsevierViewall">Regarding the frequency of coagulopathies&#44; as expected&#44; vWD1 &#40;together with factor <span class="elsevierStyleSmallCaps">xii</span> deficiencies&#41; was the most frequent&#46;</p><p id="par0260" class="elsevierStylePara elsevierViewall">The diagnosis of vWD1 is still a challenge&#46; Multiple factors&#44; such as age&#44; blood group&#44; stress situations&#44; inflammatory conditions and pregnancy itself&#44; contribute to alterations in VWF&#58;Ag plasma levels&#46; Clinical symptoms vary among affected members of the same family&#46;<a class="elsevierStyleCrossRef" href="#bib0225"><span class="elsevierStyleSup">18</span></a> In addition&#44; VWF&#58;Ag plasma levels used as a cut point for diagnosis are controversial&#46; Several cut points have been proposed&#44; from 15&#37; to 50&#37;&#44; with no consensus&#46;<a class="elsevierStyleCrossRefs" href="#bib0220"><span class="elsevierStyleSup">17&#44;19</span></a> Using a 40&#37; cut point for both VWF&#58;Ag and ristocetin co-factor seems to prevent both over- and under-diagnoses&#46;<a class="elsevierStyleCrossRef" href="#bib0235"><span class="elsevierStyleSup">20</span></a> However&#44; the current laboratory criterion proposed by the ISTH is VWF&#58;Ag levels below 20&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">17</span></a> In addition to laboratory criteria&#44; there must be a compatible FH and personal history&#46; The diagnosis is definite if 3 criteria are fulfilled&#44; and is only suggestive if some of the bleeding criteria&#44; whether individual or family&#44; are not fulfilled&#46; In 2000&#44; Dean et al&#46; published a study comparing the application of these criteria in paediatrics&#58; parents must register the exact duration of all haemorrhagic episodes&#59; the existence of an FH could be underrated if the patient has younger siblings who have not undergone any haemostatic challenge&#59; and the patient might not have exhibited significant bleeding due not having undergone haemostatic challenges&#46;<a class="elsevierStyleCrossRef" href="#bib0240"><span class="elsevierStyleSup">21</span></a></p><p id="par0265" class="elsevierStylePara elsevierViewall">Hyatt et al&#46; also stated that the ISTH<a class="elsevierStyleCrossRef" href="#bib0220"><span class="elsevierStyleSup">17</span></a> and <span class="elsevierStyleItalic">Hospital for Sick Children</span> &#40;HSC&#41; criteria are too strict for children&#46;<a class="elsevierStyleCrossRef" href="#bib0205"><span class="elsevierStyleSup">14</span></a> These authors retrospectively reviewed cases diagnosed with vWD1 according to the criteria of the hospital&#39;s haematologist&#46; Afterwards&#44; they applied the current ISTH and HSC criteria&#58; 20&#37; were diagnosed with vWD1 according to the ISTH criteria&#44; and 90&#37; according to the HSC criteria&#46; It is important to apply universal criteria to diagnose vWD1&#44; and this has not been done in our unit&#46; But even more importantly&#44; the criteria must be adapted to children&#46;</p><p id="par0270" class="elsevierStylePara elsevierViewall">The greatest number of patients diagnosed with vWD1 were from the group with a prolonged APTT and clinical symptoms of bleeding&#44; but there was a case from the group with normal APTT and PA with clinical symptoms&#58; factor <span class="elsevierStyleSmallCaps">viii</span> activity&#44; and&#44; consequently&#44; APTT levels can be normal when VWF&#58;Ag is higher than 35&#37;&#46;<a class="elsevierStyleCrossRef" href="#bib0160"><span class="elsevierStyleSup">5</span></a></p><p id="par0275" class="elsevierStylePara elsevierViewall">As for haemophilia A and B&#44; in our series we diagnosed 1 haemophilia B case&#44; without bleeding&#44; with a factor <span class="elsevierStyleSmallCaps">ix</span> &#62;40&#37;&#46;<a class="elsevierStyleCrossRefs" href="#bib0160"><span class="elsevierStyleSup">5&#44;22</span></a></p><p id="par0280" class="elsevierStylePara elsevierViewall">Rare coagulation disorders represent between 3&#37; and 5&#37; of all coagulopathies&#46; Factor <span class="elsevierStyleSmallCaps">vii</span> deficiency is the most frequent disorder within this group&#44; with a predominance of 1&#58;500&#44;000&#46;<a class="elsevierStyleCrossRef" href="#bib0250"><span class="elsevierStyleSup">23</span></a> However&#44; in our series&#44; the most common deficiency was factor <span class="elsevierStyleSmallCaps">xi</span> deficiency &#40;2 cases&#41;&#59; no factor VII deficiencies were found&#46; The high prevalence of factor XI deficiency could be due to the fact that one such patient&#44; who was asymptomatic&#44; was diagnosed following a diagnosis of this deficiency in a sibling&#46; The factor X deficiency patient in our study was an acquired case&#46;</p><p id="par0285" class="elsevierStylePara elsevierViewall">The risk of bleeding in patients with rare coagulation disorders is less predictable than in haemophilia A and B&#46;<a class="elsevierStyleCrossRef" href="#bib0255"><span class="elsevierStyleSup">24</span></a></p><p id="par0290" class="elsevierStylePara elsevierViewall">Prekallikrein&#44; HMWK and factor <span class="elsevierStyleSmallCaps">xii</span> deficiencies cause <span class="elsevierStyleItalic">in vitro</span> APTT prolongation&#44; which is not associated with a higher risk of bleeding <span class="elsevierStyleItalic">in vivo</span>&#46;<a class="elsevierStyleCrossRef" href="#bib0260"><span class="elsevierStyleSup">25</span></a> In fact&#44; some studies show that a factor <span class="elsevierStyleSmallCaps">xii</span> deficiency increases the risk of venous thrombosis&#46;<a class="elsevierStyleCrossRef" href="#bib0265"><span class="elsevierStyleSup">26</span></a> Its prevalence in the general population is 2&#46;3&#37; and it could be the most frequent cause of an unexpected prolonged APTT during preoperative workup&#46;<a class="elsevierStyleCrossRef" href="#bib0270"><span class="elsevierStyleSup">27</span></a> There are no data in the paediatric population&#44; probably due to its limited clinical manifestation&#46; In our series&#44; we found 10 patients with this disorder&#44; 9 with factor <span class="elsevierStyleSmallCaps">xii</span> deficiency and 1 with a deficiency of other contact factors&#44; which represents a frequency of 21&#37;&#46; Diagnosis of these disorders will avoid complementary tests and unnecessary exposure to blood products&#46;</p></span><span id="sec0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0085">Limitations</span><p id="par0295" class="elsevierStylePara elsevierViewall">It would be necessary to perform a prospective study with a higher number of patients to be able to confirm these conclusions satisfactorily&#46;</p><p id="par0300" class="elsevierStylePara elsevierViewall">Another limitation lies in the diagnosis of vWD1&#46; We did not use the current criteria published by ISTH or HSC&#46; Fc&#58;VIII&#44; ristocetin co-factor and VWF&#58;Ag of 45&#37; were considered pathological&#46; This threshold is higher than that recommended in the literature&#46; In addition&#44; we did not take into consideration the blood group to adjust the levels of VWF&#58;Ag&#46; It is possible that these circumstances have generated an over-diagnosis of vWD1&#46;</p></span><span id="sec0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0090">Conclusions</span><p id="par0305" class="elsevierStylePara elsevierViewall">The most frequent reason to initiate a coagulopathy analysis has been the existence of a prolonged APTT with no clinical symptoms of haemorrhage&#46; More restrictive protocols may be needed in services referring patients for coagulopathy studies&#46; It would be helpful to use questionnaires on bleeding adapted to children and perform thorough physical examinations and personal&#47;family history&#44; looking for signs that point to pathological bleedings&#46;</p><p id="par0310" class="elsevierStylePara elsevierViewall">It is important to be familiar with bleeding patterns in children in order to avoid false coagulopathy diagnoses&#46;</p><p id="par0315" class="elsevierStylePara elsevierViewall">Although the topic is beyond the scope of this study&#44; we believe that no universally accepted criteria for the diagnosis of vWD have yet been established&#46;</p><p id="par0320" class="elsevierStylePara elsevierViewall">Finally&#44; clinical symptoms must always correlate with laboratory results&#58; normal levels of APTT and PA with pathological bleeding require further analyses&#46;</p></span><span id="sec0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0095">Conflict of interests</span><p id="par0325" class="elsevierStylePara elsevierViewall">The authors declare that there are no conflicts of interest&#46;</p></span></span>"
    "textoCompletoSecciones" => array:1 [
      "secciones" => array:12 [
        0 => array:3 [
          "identificador" => "xres600562"
          "titulo" => "Abstract"
          "secciones" => array:4 [
            0 => array:2 [
              "identificador" => "abst0005"
              "titulo" => "Introduction"
            ]
            1 => array:2 [
              "identificador" => "abst0010"
              "titulo" => "Patients and methods"
            ]
            2 => array:2 [
              "identificador" => "abst0015"
              "titulo" => "Results"
            ]
            3 => array:2 [
              "identificador" => "abst0020"
              "titulo" => "Conclusions"
            ]
          ]
        ]
        1 => array:2 [
          "identificador" => "xpalclavsec614807"
          "titulo" => "Keywords"
        ]
        2 => array:3 [
          "identificador" => "xres600561"
          "titulo" => "Resumen"
          "secciones" => array:4 [
            0 => array:2 [
              "identificador" => "abst0025"
              "titulo" => "Introducci&#243;n"
            ]
            1 => array:2 [
              "identificador" => "abst0030"
              "titulo" => "Pacientes y m&#233;todos"
            ]
            2 => array:2 [
              "identificador" => "abst0035"
              "titulo" => "Resultados"
            ]
            3 => array:2 [
              "identificador" => "abst0040"
              "titulo" => "Conclusiones"
            ]
          ]
        ]
        3 => array:2 [
          "identificador" => "xpalclavsec614808"
          "titulo" => "Palabras clave"
        ]
        4 => array:2 [
          "identificador" => "sec0005"
          "titulo" => "Introduction"
        ]
        5 => array:2 [
          "identificador" => "sec0010"
          "titulo" => "Patients and methods"
        ]
        6 => array:2 [
          "identificador" => "sec0015"
          "titulo" => "Results"
        ]
        7 => array:2 [
          "identificador" => "sec0020"
          "titulo" => "Discussion"
        ]
        8 => array:2 [
          "identificador" => "sec0025"
          "titulo" => "Limitations"
        ]
        9 => array:2 [
          "identificador" => "sec0030"
          "titulo" => "Conclusions"
        ]
        10 => array:2 [
          "identificador" => "sec0035"
          "titulo" => "Conflict of interests"
        ]
        11 => array:1 [
          "titulo" => "References"
        ]
      ]
    ]
    "pdfFichero" => "main.pdf"
    "tienePdf" => true
    "fechaRecibido" => "2014-11-24"
    "fechaAceptado" => "2015-04-13"
    "PalabrasClave" => array:2 [
      "en" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Keywords"
          "identificador" => "xpalclavsec614807"
          "palabras" => array:4 [
            0 => "Paediatric bleeding"
            1 => "Coagulopathy"
            2 => "Von Willebrand disease"
            3 => "Coagulation tests"
          ]
        ]
      ]
      "es" => array:1 [
        0 => array:4 [
          "clase" => "keyword"
          "titulo" => "Palabras clave"
          "identificador" => "xpalclavsec614808"
          "palabras" => array:4 [
            0 => "Sangrado infantil"
            1 => "Coagulopat&#237;a"
            2 => "Enfermedad de von Willebrand"
            3 => "Pruebas de coagulaci&#243;n"
          ]
        ]
      ]
    ]
    "tieneResumen" => true
    "resumen" => array:2 [
      "en" => array:3 [
        "titulo" => "Abstract"
        "resumen" => "<span id="abst0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Introduction</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Symptoms&#47;signs suggestive of coagulopathy is a frequent complaint in Paediatric Haematology units&#46; Both the clinical and family history are essential for diagnosis&#46;</p></span> <span id="abst0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Patients and methods</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Retrospective and descriptive study of patients referred to a Paediatric Haematology unit of a tertiary hospital for possible coagulopathy during 2012&#46;</p></span> <span id="abst0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0020">Results</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">A total of 47 children were studied&#44; of whom 61&#46;7&#37; had not previously presented bleeding&#46; The most frequent reason for referral was a prolonged activated partial thromboplastin time without any haemorrhage &#40;42&#46;5&#37;&#41;&#44; of these&#44; 25&#37; were diagnosed with coagulopathy with a real risk of bleeding&#46; Patients referred due to a prolonged activated partial thromboplastin time with bleeding more frequently &#40;41&#46;7&#37;&#41; present coagulopathy with a real risk of bleeding&#46; Children with a family history of bleeding are diagnosed more frequently with coagulopathy with real risk of bleeding&#58; 37&#46;5&#37; &#40;family history&#41; <span class="elsevierStyleItalic">vs&#46;</span> 14&#46;3&#37; &#40;no family history&#41;&#46; The most frequent diagnoses were&#58; healthy children &#40;48&#46;9&#37;&#41;&#44; von Willebrand type 1 disease &#40;19&#46;1&#37;&#41;&#44; factor <span class="elsevierStyleSmallCaps">xii</span> deficiency &#40;19&#46;1&#37;&#41;&#44; factor <span class="elsevierStyleSmallCaps">xi</span> deficiency &#40;4&#46;2&#37;&#41;&#44; prekalikrein&#47;high molecular weight kininogen deficiency &#40;2&#46;1&#37;&#41;&#44; acquired deficiency of factor <span class="elsevierStyleSmallCaps">x</span> &#40;2&#46;1&#37;&#41;&#44; and factor <span class="elsevierStyleSmallCaps">ix</span> deficiency &#40;2&#46;1&#37;&#41;&#46;</p></span> <span id="abst0020" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0025">Conclusions</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">A thorough personal and family bleeding history and physical examination are the first steps for a correct differential diagnosis&#46; The reason for referral should be based more on clinical bleeding and not just on an abnormal coagulation time&#46; The most frequent diagnoses were type 1 von Willebrand disease and factor <span class="elsevierStyleSmallCaps">xii</span> deficiency&#46;</p></span>"
        "secciones" => array:4 [
          0 => array:2 [
            "identificador" => "abst0005"
            "titulo" => "Introduction"
          ]
          1 => array:2 [
            "identificador" => "abst0010"
            "titulo" => "Patients and methods"
          ]
          2 => array:2 [
            "identificador" => "abst0015"
            "titulo" => "Results"
          ]
          3 => array:2 [
            "identificador" => "abst0020"
            "titulo" => "Conclusions"
          ]
        ]
      ]
      "es" => array:3 [
        "titulo" => "Resumen"
        "resumen" => "<span id="abst0025" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0035">Introducci&#243;n</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">Los s&#237;ntomas&#47;signos indicativos de una coagulopat&#237;a son un motivo de consulta frecuente en las unidades de Hematolog&#237;a Pedi&#225;trica&#46; Tanto la cl&#237;nica como los antecedentes familiares son fundamentales para el diagn&#243;stico&#46;</p></span> <span id="abst0030" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0040">Pacientes y m&#233;todos</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Estudio retrospectivo y descriptivo de los pacientes derivados a una consulta de Hematolog&#237;a Pedi&#225;trica de un hospital de tercer nivel por posible coagulopat&#237;a durante el a&#241;o 2012&#46;</p></span> <span id="abst0035" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0045">Resultados</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">Se estudiaron 47 ni&#241;os&#46; El 61&#44;7&#37; no hab&#237;a presentado previamente sangrado&#46; El motivo de derivaci&#243;n m&#225;s frecuente fue un tiempo de tromboplastina parcial activada alargado sin hemorragia &#40;42&#44;5&#37;&#41;&#59; de estos&#44; un 25&#37; fue diagnosticado de una coagulopat&#237;a con riesgo real de sangrado&#46; En los pacientes derivados por tiempo de tromboplastina parcial activada alargado con cl&#237;nica hemorr&#225;gica se detecta una coagulopat&#237;a con riesgo real de sangrado con mayor frecuencia &#40;41&#44;7&#37;&#41;&#46; En los ni&#241;os con antecedentes familiares de sangrado se diagnostica con m&#225;s frecuencia una coagulopat&#237;a con riesgo real de sangrado&#58; 37&#44;5 vs&#46; 14&#44;3&#37; &#40;ni&#241;os sin antecedentes familiares&#41;&#46; Los diagn&#243;sticos han sido&#58; sano &#40;48&#44;9&#37;&#41;&#44; enfermedad de von Willebrand tipo1 &#40;19&#44;1&#37;&#41;&#44; d&#233;ficit de factor <span class="elsevierStyleSmallCaps">xii</span> &#40;19&#44;1&#37;&#41;&#44; d&#233;ficit de factor <span class="elsevierStyleSmallCaps">xi</span> &#40;4&#44;2&#37;&#41;&#44; d&#233;ficit de precalicre&#237;na&#47;cinin&#243;geno de alto peso molecular &#40;2&#44;1&#37;&#41;&#44; d&#233;ficit adquirido de factor <span class="elsevierStyleSmallCaps">x</span> &#40;2&#44;1&#37;&#41; y d&#233;ficit de factor <span class="elsevierStyleSmallCaps">ix</span> &#40;2&#44;1&#37;&#41;&#46;</p></span> <span id="abst0040" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0050">Conclusiones</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">Los antecedentes personales y familiares de sangrado orientan el diagn&#243;stico de una coagulopat&#237;a&#46; El motivo de derivaci&#243;n deber&#237;a basarse en mayor medida en la cl&#237;nica hemorr&#225;gica y no solo en un tiempo de laboratorio alterado&#46; Los diagn&#243;sticos m&#225;s frecuentes han sido enfermedad de von Willebrand tipo 1 y d&#233;ficit de factor <span class="elsevierStyleSmallCaps">xii&#46;</span></p></span>"
        "secciones" => array:4 [
          0 => array:2 [
            "identificador" => "abst0025"
            "titulo" => "Introducci&#243;n"
          ]
          1 => array:2 [
            "identificador" => "abst0030"
            "titulo" => "Pacientes y m&#233;todos"
          ]
          2 => array:2 [
            "identificador" => "abst0035"
            "titulo" => "Resultados"
          ]
          3 => array:2 [
            "identificador" => "abst0040"
            "titulo" => "Conclusiones"
          ]
        ]
      ]
    ]
    "NotaPie" => array:1 [
      0 => array:2 [
        "etiqueta" => "&#9734;"
        "nota" => "<p class="elsevierStyleNotepara" id="npar0020">Please cite this article as&#58; Romero I&#44; Conde N&#44; Aldana DG&#44; Ruano A&#44; Fern&#225;ndez-Teijeiro A&#46; Revisi&#243;n de los pacientes estudiados por coagulopat&#237;a en una unidad de Oncohematolog&#237;a&#46; An Pediatr &#40;Barc&#41;&#46; 2016&#59;84&#58;85&#8211;91&#46;</p>"
      ]
    ]
    "multimedia" => array:4 [
      0 => array:7 [
        "identificador" => "tbl0005"
        "etiqueta" => "Table 1"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:1 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Origin&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Number of patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Percentage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Primary care&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">21&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Emergency room&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">17&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Patients&#8217; siblings attending follow-up visits due to coagulopathies&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">17&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Anaesthesia&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">14&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Paediatric surgery&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">12&#46;8&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Hospitalisation unit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Paediatric oncology&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Neonatology&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">IC paediatric unit&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Dentistry&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">ENT&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab982559.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0045" class="elsevierStyleSimplePara elsevierViewall">Origin of the children under study due to coagulopathies&#46;</p>"
        ]
      ]
      1 => array:7 [
        "identificador" => "tbl0010"
        "etiqueta" => "Table 2"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Diagnosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Number of patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Percentage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span><a class="elsevierStyleCrossRef" href="#tblfn0005"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Healthy</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">23&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">48&#46;9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">30&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;061&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">16&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">69&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">VWD1</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;058&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td" title="table-entry  " rowspan="3" align="left" valign="top">Factor XII deficiency</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">19&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">0&#46;317&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;7&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="5" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Factor <span class="elsevierStyleSmallCaps">xi</span> deficiency&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Contact factor deficiency &#40;other than <span class="elsevierStyleSmallCaps">xii</span>&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Acquired factor <span class="elsevierStyleSmallCaps">x</span> deficiency&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Factor <span class="elsevierStyleSmallCaps">ix</span> deficiency&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">No&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Lost&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">Yes&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&#46;1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab982561.png"
              ]
            ]
          ]
          "notaPie" => array:1 [
            0 => array:3 [
              "identificador" => "tblfn0005"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Chi-square goodness of fit test&#46;</p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0050" class="elsevierStyleSimplePara elsevierViewall">Final diagnoses and existence&#47;absence of haemorrhagic clinical symptoms&#46;</p>"
        ]
      ]
      2 => array:7 [
        "identificador" => "tbl0015"
        "etiqueta" => "Table 3"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:3 [
          "leyenda" => "<p id="spar0060" class="elsevierStyleSimplePara elsevierViewall">FH&#44; family history&#59; NS&#44; non-statistically significant differences&#46;</p><p id="spar0065" class="elsevierStyleSimplePara elsevierViewall">Data expressed as <span class="elsevierStyleItalic">n</span> &#40;&#37;&#41;&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Final diagnosis&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Total &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>45&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">With an FH of bleeding &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>24&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">No FH of bleeding &#40;<span class="elsevierStyleItalic">n</span><span class="elsevierStyleHsp" style=""></span>&#61;<span class="elsevierStyleHsp" style=""></span>21&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black"><span class="elsevierStyleItalic">p</span><a class="elsevierStyleCrossRef" href="#tblfn0015"><span class="elsevierStyleSup">&#42;</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Healthy&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">23 &#40;51&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">13 &#40;56&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;43&#46;5&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">NS<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Coagulopathy with no risk of bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10 &#40;22&#46;1&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2 &#40;20&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">8 &#40;80&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top"><span class="elsevierStyleBold">0&#46;029</span><a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top">Coagulopathy with risk of bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">12 &#40;26&#46;7&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9 &#40;75&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">3 &#40;25&#41;&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="left" valign="top">0&#46;07<a class="elsevierStyleCrossRef" href="#tblfn0010"><span class="elsevierStyleSup">a</span></a>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab982560.png"
              ]
            ]
          ]
          "notaPie" => array:2 [
            0 => array:3 [
              "identificador" => "tblfn0010"
              "etiqueta" => "a"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0010">Fisher&#39;s exact test&#46;</p>"
            ]
            1 => array:3 [
              "identificador" => "tblfn0015"
              "etiqueta" => "&#42;"
              "nota" => "<p class="elsevierStyleNotepara" id="npar0015">Statistical significance of the differences between the group with and without a family history of bleeding&#46;</p>"
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0055" class="elsevierStyleSimplePara elsevierViewall">Family history of bleeding&#46;</p>"
        ]
      ]
      3 => array:7 [
        "identificador" => "tbl0020"
        "etiqueta" => "Table 4"
        "tipo" => "MULTIMEDIATABLA"
        "mostrarFloat" => true
        "mostrarDisplay" => false
        "tabla" => array:2 [
          "leyenda" => "<p id="spar0075" class="elsevierStyleSimplePara elsevierViewall">PA&#44; prothrombin activity&#59; APTT&#44; activated partial thromboplastin time&#46;</p>"
          "tablatextoimagen" => array:1 [
            0 => array:2 [
              "tabla" => array:1 [
                0 => """
                  <table border="0" frame="\n
                  \t\t\t\t\tvoid\n
                  \t\t\t\t" class=""><thead title="thead"><tr title="table-row"><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Reason for the referral&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Number of patients&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th><th class="td" title="table-head  " align="left" valign="top" scope="col" style="border-bottom: 2px solid black">Percentage&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</th></tr></thead><tbody title="tbody"><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Prolonged APTT</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">33&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">70&#46;2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>No bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">20&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">66&#46;6&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">13&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">39&#46;4&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="3" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Patients&#8217; siblings attending follow-up visits due to coagulopathies</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">21&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>No bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">9&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">90&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">1&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">10&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="3" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Bleeding with APTT and PA normal levels</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td" title="table-entry  " colspan="3" align="left" valign="top"><span class="elsevierStyleVsp" style="height:0.5px"></span></td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleItalic">Bleeding with reduced PA</span>&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="" valign="top">&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr><tr title="table-row"><td class="td-with-role" title="table-entry ; entry_with_role_rowhead " align="left" valign="top"><span class="elsevierStyleHsp" style=""></span>Bleeding&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">2&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td><td class="td" title="table-entry  " align="char" valign="top">4&#46;3&nbsp;\t\t\t\t\t\t\n
                  \t\t\t\t</td></tr></tbody></table>
                  """
              ]
              "imagenFichero" => array:1 [
                0 => "xTab982558.png"
              ]
            ]
          ]
        ]
        "descripcion" => array:1 [
          "en" => "<p id="spar0070" class="elsevierStyleSimplePara elsevierViewall">Reason for the referral&#46;</p>"
        ]
      ]
    ]
    "bibliografia" => array:2 [
      "titulo" => "References"
      "seccion" => array:1 [
        0 => array:2 [
          "identificador" => "bibs0005"
          "bibliografiaReferencia" => array:27 [
            0 => array:3 [
              "identificador" => "bib0140"
              "etiqueta" => "1"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Bleeding&#47;bruising symptomatology in children with and without bleeding disorders"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "B&#46; Nosek-Cenkowska"
                            1 => "M&#46;S&#46; Cheang"
                            2 => "N&#46;J&#46; Pizzi"
                            3 => "E&#46;D&#46; Israels"
                            4 => "J&#46;M&#46; Gerrard"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thromb Haemost"
                        "fecha" => "1991"
                        "volumen" => "65"
                        "paginaInicial" => "237"
                        "paginaFinal" => "241"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/2048048"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            1 => array:3 [
              "identificador" => "bib0145"
              "etiqueta" => "2"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Epidemiological investigation of the prevalence of von Willebrand&#39;s disease"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "F&#46; Rodeghiero"
                            1 => "G&#46; Castaman"
                            2 => "E&#46; Dini"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Blood"
                        "fecha" => "1987"
                        "volumen" => "69"
                        "paginaInicial" => "454"
                        "paginaFinal" => "459"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/3492222"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            2 => array:3 [
              "identificador" => "bib0150"
              "etiqueta" => "3"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Prevalence of von Willebrand disease in children&#58; a multiethnic study"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "E&#46;J&#46; Werner"
                            1 => "E&#46;H&#46; Broxson"
                            2 => "E&#46;L&#46; Tucker"
                            3 => "D&#46;S&#46; Giroux"
                            4 => "J&#46; Shults"
                            5 => "T&#46;C&#46; Abshire"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "J Pediatr"
                        "fecha" => "1993"
                        "volumen" => "123"
                        "paginaInicial" => "893"
                        "paginaFinal" => "898"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/8229521"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            3 => array:3 [
              "identificador" => "bib0155"
              "etiqueta" => "4"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A prospective evaluation of the prevalence of symptomatic von Willebrand disease in a pediatric primary care population"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:6 [
                            0 => "M&#46; Bowman"
                            1 => "W&#46;M&#46; Hopman"
                            2 => "D&#46; Rapson"
                            3 => "D&#46; Lillicrap"
                            4 => "M&#46; Silva"
                            5 => "P&#46; James"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/pbc.22429"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Blood Cancer"
                        "fecha" => "2010"
                        "volumen" => "55"
                        "paginaInicial" => "171"
                        "paginaFinal" => "173"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/20213845"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            4 => array:3 [
              "identificador" => "bib0160"
              "etiqueta" => "5"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Inherited abnormalities of coagulation"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "R&#46; Kumar"
                            1 => "M&#46; Carcao"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.pcl.2013.09.002"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Clin North Am"
                        "fecha" => "2013"
                        "volumen" => "60"
                        "paginaInicial" => "1419"
                        "paginaFinal" => "1441"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/24237980"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            5 => array:3 [
              "identificador" => "bib0165"
              "etiqueta" => "6"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Biochemistry and physiology of blood coagulation"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "K&#46;G&#46; Mann"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:4 [
                        "tituloSerie" => "Thromb Haemost"
                        "fecha" => "1999"
                        "volumen" => "2"
                        "paginaInicial" => "165"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            6 => array:3 [
              "identificador" => "bib0170"
              "etiqueta" => "7"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Clinical indicators compendium"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "American Academy of Otolaryngology-Head and Neck Surgery"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Libro" => array:3 [
                        "fecha" => "1999"
                        "editorial" => "American Academy of Otolaryngology-Head and Neck Surgery"
                        "editorialLocalizacion" => "Alexandria&#44; VA"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            7 => array:3 [
              "identificador" => "bib0175"
              "etiqueta" => "8"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Guidelines of the assessment of bleeding risk prior to surgery or invasive procedures"
                      "autores" => array:1 [
                        0 => array:3 [
                          "colaboracion" => "British Committee for Standards in Haematology"
                          "etal" => false
                          "autores" => array:4 [
                            0 => "Y&#46;L&#46; Chee"
                            1 => "J&#46;C&#46; Crawford"
                            2 => "H&#46;G&#46; Watson"
                            3 => "M&#46; Greaves"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1365-2141.2007.06968.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "Br J Haematol"
                        "fecha" => "2008"
                        "volumen" => "140"
                        "paginaInicial" => "496"
                        "paginaFinal" => "550"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18275427"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            8 => array:3 [
              "identificador" => "bib0180"
              "etiqueta" => "9"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A cost-effectiveness analysis of coagulation testing prior to tonsillectomy and adenoidectomy in children"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "J&#46;D&#46; Cooper"
                            1 => "K&#46;J&#46; Smith"
                            2 => "A&#46;K&#46; Ritchey"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/pbc.22708"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Blood Cancer"
                        "fecha" => "2010"
                        "volumen" => "55"
                        "paginaInicial" => "1153"
                        "paginaFinal" => "1159"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/20672369"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            9 => array:3 [
              "identificador" => "bib0185"
              "etiqueta" => "10"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Hemorragia postamigdalectom&#237;a&#58; &#191;tienen las pruebas de coagulaci&#243;n y el historial de coagulopat&#237;a un valor predictivo&#63;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "O&#46; Zag&#243;lski"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.otorri.2010.01.017"
                      "Revista" => array:6 [
                        "tituloSerie" => "Acta Otorrinolaringol Esp"
                        "fecha" => "2010"
                        "volumen" => "61"
                        "paginaInicial" => "287"
                        "paginaFinal" => "292"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/20579952"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            10 => array:3 [
              "identificador" => "bib0190"
              "etiqueta" => "11"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Utilidad de la anamnesis en la detecci&#243;n de trastornos de la coagulaci&#243;n"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "G&#46; Hubner"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Rev Chil Pediatr"
                        "fecha" => "1986"
                        "volumen" => "57"
                        "paginaInicial" => "138"
                        "paginaFinal" => "140"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/3562947"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            11 => array:3 [
              "identificador" => "bib0195"
              "etiqueta" => "12"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Provisional criteria for the diagnosis of VWD type 1"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "J&#46;E&#46; Sadler"
                            1 => "F&#46; Rodeghiero"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1538-7836.2005.01245.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Thromb Haemost"
                        "fecha" => "2005"
                        "volumen" => "3"
                        "paginaInicial" => "775"
                        "paginaFinal" => "777"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15842361"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            12 => array:3 [
              "identificador" => "bib0200"
              "etiqueta" => "13"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Von Willebrand disease&#58; evidence-based diagnosis and management guidelines&#44; the National Heart&#44; Lung&#44; and Blood Institute &#40;NHLBI&#41; Expert Panel report &#40;USA&#41;"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "W&#46;L&#46; Nichols"
                            1 => "M&#46;B&#46; Hultin"
                            2 => "A&#46;H&#46; James"
                            3 => "M&#46;J&#46; Manco-Johnson"
                            4 => "R&#46;R&#46; Montgomery"
                            5 => "T&#46;L&#46; Ortel"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1365-2516.2007.01643.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "Haemophilia"
                        "fecha" => "2008"
                        "volumen" => "14"
                        "paginaInicial" => "171"
                        "paginaFinal" => "232"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18315614"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            13 => array:3 [
              "identificador" => "bib0205"
              "etiqueta" => "14"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Applying diagnostic criteria for type 1 von Willebrand disease to a pediatric population"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:4 [
                            0 => "S&#46;A&#46; Hyatt"
                            1 => "W&#46; Wang"
                            2 => "B&#46;A&#46; Kerlin"
                            3 => "S&#46;H&#46; O&#8217;Brien"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/pbc.21755"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Blood Cancer"
                        "fecha" => "2009"
                        "volumen" => "52"
                        "paginaInicial" => "102"
                        "paginaFinal" => "107"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18816699"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            14 => array:3 [
              "identificador" => "bib0210"
              "etiqueta" => "15"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The diagnosis of von Willebrand disease&#58; a guideline from the UK Haemophilia Centre Doctors&#8217; Organization"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "M&#46; Laffan"
                            1 => "S&#46;A&#46; Brown"
                            2 => "P&#46;W&#46; Collins"
                            3 => "A&#46;M&#46; Cumming"
                            4 => "F&#46;G&#46; Hill"
                            5 => "D&#46; Keeling"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1365-2516.2004.00894.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "Haemophilia"
                        "fecha" => "2004"
                        "volumen" => "10"
                        "paginaInicial" => "199"
                        "paginaFinal" => "217"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/15086318"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            15 => array:3 [
              "identificador" => "bib0215"
              "etiqueta" => "16"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The bleeding edge of symptom assessment"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "J&#46;A&#46; Shavit"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/pbc.24067"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Blood Cancer"
                        "fecha" => "2012"
                        "volumen" => "58"
                        "paginaInicial" => "657"
                        "paginaFinal" => "658"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/22238179"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            16 => array:3 [
              "identificador" => "bib0220"
              "etiqueta" => "17"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Update on the pathophysiology and classification of von Willebrand disease&#58; a report of the Subcommitte on von Willebrand Factor"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "J&#46;E&#46; Sadler"
                            1 => "U&#46; Budde"
                            2 => "J&#46;C&#46; Eikenboom"
                            3 => "E&#46;J&#46; Favaloro"
                            4 => "F&#46;G&#46; Hill"
                            5 => "L&#46; Holmberg"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1538-7836.2006.02146.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "J Thromb Haemost"
                        "fecha" => "2006"
                        "volumen" => "4"
                        "paginaInicial" => "2103"
                        "paginaFinal" => "2114"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/16889557"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            17 => array:3 [
              "identificador" => "bib0225"
              "etiqueta" => "18"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Von Willebrand disease"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "W&#46;C&#46; Nichols"
                            1 => "D&#46; Ginsburg"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Medicine &#40;Baltimore&#41;"
                        "fecha" => "1997"
                        "volumen" => "76"
                        "paginaInicial" => "1"
                        "paginaFinal" => "20"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            18 => array:3 [
              "identificador" => "bib0230"
              "etiqueta" => "19"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Von Willebrand disease"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "J&#46; Robertson"
                            1 => "D&#46; Lillicrap"
                            2 => "P&#46;D&#46; James"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1016/j.pcl.2008.01.008"
                      "Revista" => array:6 [
                        "tituloSerie" => "Pediatr Clin North Am"
                        "fecha" => "2008"
                        "volumen" => "55"
                        "paginaInicial" => "377"
                        "paginaFinal" => "392"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18381092"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            19 => array:3 [
              "identificador" => "bib0235"
              "etiqueta" => "20"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Evidence-based diagnosis of type 1 von Willebrand disease&#58; a Bayes theorem approach"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "A&#46; Tosetto"
                            1 => "G&#46; Castaman"
                            2 => "F&#46; Rodeghiero"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1182/blood-2007-08-105940"
                      "Revista" => array:6 [
                        "tituloSerie" => "Blood"
                        "fecha" => "2008"
                        "volumen" => "111"
                        "paginaInicial" => "3998"
                        "paginaFinal" => "4003"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/18187661"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            20 => array:3 [
              "identificador" => "bib0240"
              "etiqueta" => "21"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Von Willebrand disease in a pediatric-based population &#8211; comparison of type 1 diagnostic criteria and use of the PFA-100 and a von Willebrand factor&#47;collagen-binding assay"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "J&#46;A&#46; Dean"
                            1 => "V&#46;S&#46; Blanchette"
                            2 => "M&#46;D&#46; Carcao"
                            3 => "A&#46;M&#46; Stain"
                            4 => "C&#46;R&#46; Sparling"
                            5 => "J&#46; Siekmann"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Thromb Haemost"
                        "fecha" => "2000"
                        "volumen" => "84"
                        "paginaInicial" => "401"
                        "paginaFinal" => "409"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/11019962"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            21 => array:3 [
              "identificador" => "bib0245"
              "etiqueta" => "22"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A study of variations in the reported haemophilia B prevalence around the world"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:5 [
                            0 => "J&#46;S&#46; Stonebraker"
                            1 => "P&#46;H&#46; Bolton-Maggs"
                            2 => "J&#46; Michael Soucie"
                            3 => "I&#46; Walker"
                            4 => "M&#46; Brooker"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1111/j.1365-2516.2011.02588.x"
                      "Revista" => array:6 [
                        "tituloSerie" => "Haemophilia"
                        "fecha" => "2012"
                        "volumen" => "18"
                        "paginaInicial" => "e91"
                        "paginaFinal" => "e94"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/21649801"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            22 => array:3 [
              "identificador" => "bib0250"
              "etiqueta" => "23"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "National and international registries of rare bleeding disorders"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:2 [
                            0 => "F&#46; Peyvandi"
                            1 => "M&#46; Spreafico"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:7 [
                        "tituloSerie" => "Blood Transfus"
                        "fecha" => "2008"
                        "volumen" => "6"
                        "numero" => "Suppl&#46; 2"
                        "paginaInicial" => "s45"
                        "paginaFinal" => "s48"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/19115503"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            23 => array:3 [
              "identificador" => "bib0255"
              "etiqueta" => "24"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "The rare inherited coagulation disorders"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "P&#46;H&#46; Bolton-Maggs"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:2 [
                      "doi" => "10.1002/pbc.24336"
                      "Revista" => array:7 [
                        "tituloSerie" => "Pediatr Blood Cancer"
                        "fecha" => "2013"
                        "volumen" => "60"
                        "numero" => "Suppl&#46; 1"
                        "paginaInicial" => "S37"
                        "paginaFinal" => "S40"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/23109366"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            24 => array:3 [
              "identificador" => "bib0260"
              "etiqueta" => "25"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Trastornos de la coagulaci&#243;n en la edad pedi&#225;trica"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:3 [
                            0 => "M&#46;C&#46; Amigo Bello"
                            1 => "J&#46; Sevilla Navarro"
                            2 => "L&#46; Madero-L&#243;pez"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:5 [
                        "tituloSerie" => "Pediatr Integral"
                        "fecha" => "2004"
                        "volumen" => "VIII"
                        "paginaInicial" => "404"
                        "paginaFinal" => "419"
                      ]
                    ]
                  ]
                ]
              ]
            ]
            25 => array:3 [
              "identificador" => "bib0265"
              "etiqueta" => "26"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "A common genetic polymorphism &#40;46 C to T substitution&#41; in the 5&#8242; untranslated region of the coagulation factor <span class="elsevierStyleSmallCaps">xii</span> gene is associated with translation efficiency and decrease in plasma factor <span class="elsevierStyleSmallCaps">xii</span> level"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => true
                          "autores" => array:6 [
                            0 => "T&#46; Kanaji"
                            1 => "T&#46; Okamura"
                            2 => "K&#46; Osaki"
                            3 => "M&#46; Kuroiwa"
                            4 => "K&#46; Shimoda"
                            5 => "N&#46; Hamasaki"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Revista" => array:6 [
                        "tituloSerie" => "Blood"
                        "fecha" => "1998"
                        "volumen" => "91"
                        "paginaInicial" => "2010"
                        "paginaFinal" => "2014"
                        "link" => array:1 [
                          0 => array:2 [
                            "url" => "https://www.ncbi.nlm.nih.gov/pubmed/9490684"
                            "web" => "Medline"
                          ]
                        ]
                      ]
                    ]
                  ]
                ]
              ]
            ]
            26 => array:3 [
              "identificador" => "bib0270"
              "etiqueta" => "27"
              "referencia" => array:1 [
                0 => array:2 [
                  "contribucion" => array:1 [
                    0 => array:2 [
                      "titulo" => "Trastornos de la coagulaci&#243;n poco comunes"
                      "autores" => array:1 [
                        0 => array:2 [
                          "etal" => false
                          "autores" => array:1 [
                            0 => "P&#46;H&#46;B&#46; Bolton-Maggs"
                          ]
                        ]
                      ]
                    ]
                  ]
                  "host" => array:1 [
                    0 => array:1 [
                      "Libro" => array:3 [
                        "fecha" => "2006"
                        "editorial" => "Federaci&#243;n Mundial de Hemofilia"
                        "editorialLocalizacion" => "Qu&#233;bec&#44; Montr&#233;al"
                      ]
                    ]
                  ]
                ]
              ]
            ]
          ]
        ]
      ]
    ]
  ]
  "idiomaDefecto" => "en"
  "url" => "/23412879/0000008400000002/v1_201601300058/S2341287915002148/v1_201601300058/en/main.assets"
  "Apartado" => array:4 [
    "identificador" => "26005"
    "tipo" => "SECCION"
    "en" => array:2 [
      "titulo" => "Original Articles"
      "idiomaDefecto" => true
    ]
    "idiomaDefecto" => "en"
  ]
  "PDF" => "https://static.elsevier.es/multimedia/23412879/0000008400000002/v1_201601300058/S2341287915002148/v1_201601300058/en/main.pdf?idApp=UINPBA00005H&text.app=https://analesdepediatria.org/"
  "EPUB" => "https://multimedia.elsevier.es/PublicationsMultimediaV1/item/epub/S2341287915002148?idApp=UINPBA00005H"
]
Share
Journal Information
Vol. 84. Issue 2.
Pages 85-91 (1 February 2016)
Visits
6201
Vol. 84. Issue 2.
Pages 85-91 (1 February 2016)
Original Article
Full text access
Review of patients studied for coagulopathy in a haematology/oncology unit
Revisión de los pacientes estudiados por coagulopatía en una unidad de Oncohematología
Visits
6201
I. Romeroa, N. Condea,
Corresponding author
nuriaconde@hotmail.com

Corresponding author.
, D.G. Aldanaa, A. Ruanob, A. Fernández-Teijeiroa
a Unidad de Onco-Hematología Pediátrica, Hospital Universitario Virgen Macarena, Unidad de Gestión Clínica Intercentros de Oncología Pediátrica, Hospitales Universitarios Virgen Macarena y Virgen del Rocío, Sevilla, Spain
b Sección de Trombología, Hospital Universitario Virgen Macarena, Unidad de Gestión Clínica Intercentros de Hematología, Hospitales Universitarios Virgen Macarena y Virgen del Rocío, Sevilla, Spain
This item has received
Article information
Abstract
Full Text
Bibliography
Download PDF
Statistics
Tables (4)
Table 1. Origin of the children under study due to coagulopathies.
Table 2. Final diagnoses and existence/absence of haemorrhagic clinical symptoms.
Table 3. Family history of bleeding.
Table 4. Reason for the referral.
Show moreShow less
Abstract
Introduction

Symptoms/signs suggestive of coagulopathy is a frequent complaint in Paediatric Haematology units. Both the clinical and family history are essential for diagnosis.

Patients and methods

Retrospective and descriptive study of patients referred to a Paediatric Haematology unit of a tertiary hospital for possible coagulopathy during 2012.

Results

A total of 47 children were studied, of whom 61.7% had not previously presented bleeding. The most frequent reason for referral was a prolonged activated partial thromboplastin time without any haemorrhage (42.5%), of these, 25% were diagnosed with coagulopathy with a real risk of bleeding. Patients referred due to a prolonged activated partial thromboplastin time with bleeding more frequently (41.7%) present coagulopathy with a real risk of bleeding. Children with a family history of bleeding are diagnosed more frequently with coagulopathy with real risk of bleeding: 37.5% (family history) vs. 14.3% (no family history). The most frequent diagnoses were: healthy children (48.9%), von Willebrand type 1 disease (19.1%), factor xii deficiency (19.1%), factor xi deficiency (4.2%), prekalikrein/high molecular weight kininogen deficiency (2.1%), acquired deficiency of factor x (2.1%), and factor ix deficiency (2.1%).

Conclusions

A thorough personal and family bleeding history and physical examination are the first steps for a correct differential diagnosis. The reason for referral should be based more on clinical bleeding and not just on an abnormal coagulation time. The most frequent diagnoses were type 1 von Willebrand disease and factor xii deficiency.

Keywords:
Paediatric bleeding
Coagulopathy
Von Willebrand disease
Coagulation tests
Resumen
Introducción

Los síntomas/signos indicativos de una coagulopatía son un motivo de consulta frecuente en las unidades de Hematología Pediátrica. Tanto la clínica como los antecedentes familiares son fundamentales para el diagnóstico.

Pacientes y métodos

Estudio retrospectivo y descriptivo de los pacientes derivados a una consulta de Hematología Pediátrica de un hospital de tercer nivel por posible coagulopatía durante el año 2012.

Resultados

Se estudiaron 47 niños. El 61,7% no había presentado previamente sangrado. El motivo de derivación más frecuente fue un tiempo de tromboplastina parcial activada alargado sin hemorragia (42,5%); de estos, un 25% fue diagnosticado de una coagulopatía con riesgo real de sangrado. En los pacientes derivados por tiempo de tromboplastina parcial activada alargado con clínica hemorrágica se detecta una coagulopatía con riesgo real de sangrado con mayor frecuencia (41,7%). En los niños con antecedentes familiares de sangrado se diagnostica con más frecuencia una coagulopatía con riesgo real de sangrado: 37,5 vs. 14,3% (niños sin antecedentes familiares). Los diagnósticos han sido: sano (48,9%), enfermedad de von Willebrand tipo1 (19,1%), déficit de factor xii (19,1%), déficit de factor xi (4,2%), déficit de precalicreína/cininógeno de alto peso molecular (2,1%), déficit adquirido de factor x (2,1%) y déficit de factor ix (2,1%).

Conclusiones

Los antecedentes personales y familiares de sangrado orientan el diagnóstico de una coagulopatía. El motivo de derivación debería basarse en mayor medida en la clínica hemorrágica y no solo en un tiempo de laboratorio alterado. Los diagnósticos más frecuentes han sido enfermedad de von Willebrand tipo 1 y déficit de factor xii.

Palabras clave:
Sangrado infantil
Coagulopatía
Enfermedad de von Willebrand
Pruebas de coagulación
Full Text
Introduction

Coagulopathy-indicative signs are a frequent reason for consultation in haematology. Its diagnosis can be difficult, due to specific bleeding age patterns: epistaxis (39%) and easy bruising (24%) are common without any haemorrhagic disorder. However, these can be the only clinical symptoms in children with coagulopathies who have not undergone any haemostatic challenge.1

In addition, differential bleeding/bruising diagnosis in children includes other entities, such as platelet alterations, vasculopathies and abuse.

Among hereditary coagulopathies, the most frequent is von Willebrand disease (vWD), which has a prevalence of approximately 1%, according to studies.2,3 More recent studies, however, have reported a 0.1% prevalence of clinically symptomatic vWD in children.4 This is followed by factor viii (haemophilia A) and factor ix (haemophilia B) deficiency, with a predominance of 1:5000 males and 1:30,000 males, respectively.5

Some factor deficiencies do not result in bleeding, such as the deficiency of some contact factors: high molecular weight kininogen (HMWK), prekallikrein and factor xii. These factors are not involved in the propagation phase of the coagulation cascade and, therefore, their deficiency, in spite of prolonging the activated partial thromboplastin time (APTT) in vitro, is not associated with bleeding in vivo.6

In this study, we set out to determine which services refer the greatest number of patients for coagulation analysis and the reason for referral, to correlate laboratory findings with clinical symptoms of bleeding, and to determine the most common diagnoses made in our hospital. Greater insight into these patients will help improve diagnosis protocols.

Patients and methods

Retrospective descriptive analysis of children under study due to suspected coagulopathy at the paediatric oncohaematology unit of the Virgen Macarena University Hospital (UH) in Seville in 2012.

At this unit, in 2012, all paediatric solid/haematological tumours (except for brain tumours) and non-oncologic haematology disorders were studied and treated. Patients diagnosed with haemophilia A or B were referred to the Haemophilia Unit from the Rocio UH in Seville after diagnosis.

There were 20 new oncology patients in 2012, and 120 haematological patients.

Clinical treatment was given by paediatric haematologists and laboratory techniques by haematologists.

We have taken into consideration children with altered coagulation times, those with normal coagulation and bleeding times (after ruling out thrombocytopenia), and those studied due to having a family member with a hereditary coagulopathy. A total of 52 children were studied. Of these, 5 were oncology patients undergoing active treatment and were excluded due to the potential interactions between chemotherapy and the underlying disease.

The other 47 children were ultimately selected.

The diagnosis of coagulopathy was based on a factor plasma level of less than 45%, and in the case of vWD1, on a ristocetin co-factor of less than 45%, and a relevant clinical/family history (FH).

Factor xii, prekallikrein and HMWK deficiencies were considered as having no real risk of bleeding.

The following variables were collected: age, gender, service making the referral, reason for the referral, FH of coagulopathy/bleeding, presence and origin of previous clinical symptoms of bleeding, number of blood tests performed and final diagnosis.

A positive family history was taken into consideration if there was significant cutaneous and/or mucous bleeding in a first-degree family member. No standardised bleeding questionnaires were used.

All the data that were obtained and considered as study variables were stored and analysed with the statistical software package SPSS® v.15.0 (SPSS Inc., Chicago, IL, USA).

Descriptive statistical analysis: qualitative variables are expressed as absolute frequencies and percentages. Quantitative variables as mean, median and range.

Analytical statistical analysis: Fisher's exact test was used to compare the frequencies of 2 qualitative variables, the chi-square goodness of fit test was used to compare frequencies of the same qualitative variable, and Pearson's Chi-square test was used to analyse the association between 2 qualitative variables. A value of p<0.05 was considered significant.

Results

Data from 47 children were collected: 28 boys (59.6%) and 19 girls (40.4%).

The mean age at the first visit was 6.1 years (median: 6 years; interval: 1 month-13 years).

Patients’ origin is shown in Table 1.

Table 1.

Origin of the children under study due to coagulopathies.

Origin  Number of patients  Percentage 
Primary care  10  21.3 
Emergency room  17 
Patients’ siblings attending follow-up visits due to coagulopathies  17 
Anaesthesia  14.9 
Paediatric surgery  12.8 
Hospitalisation unit  6.4 
Paediatric oncology  2.1 
Neonatology  2.1 
IC paediatric unit  2.1 
Dentistry  2.1 
ENT  2.1 

A confirmatory diagnosis was based on the mean of 2 blood tests (median: 2; interval: 1–5).

Haemorrhagic clinical symptoms and diagnoses:

  • Eighteen of the 47 patients (38.3%) had a history of bleeding, mainly epistaxis (12 children, 66.6%).

  • No diagnosis was possible in 1 study patient who did not return for subsequent appointments. Final diagnoses, presence/absence of bleeding and statistically significant differences between bleeding/no bleeding are summarised in Table 2.

    Table 2.

    Final diagnoses and existence/absence of haemorrhagic clinical symptoms.

    Diagnosis  Bleeding  Number of patients  Percentage  pa 
    Healthy  23  48.9   
    Yes  30.4  0.061 
    No  16  69.6   
    VWD1  19.1   
    Yes  66.7  0.058 
    No  33.3   
    Factor XII deficiency  19.1   
    Yes  33.3  0.317 
    No  66.7   
    Factor xi deficiency  No  4.2   
    Contact factor deficiency (other than xiiNo  2.1   
    Acquired factor x deficiency  Yes  2.1   
    Factor ix deficiency  No  2.1   
    Lost  Yes  2.1   
    a

    Chi-square goodness of fit test.

FH of bleeding:

  • Two patients were adopted and these data could not be gathered.

  • Table 3 summarises the presence/absence of an FH of bleeding according to final diagnosis. FH of bleeding is more uncommon in children diagnosed with coagulopathy with no real risk of bleeding (p=0.029).

    Table 3.

    Family history of bleeding.

    Final diagnosis  Total (n=45)  With an FH of bleeding (n=24)  No FH of bleeding (n=21)  p* 
    Healthy  23 (51.1)  13 (56.5)  10 (43.5)  NSa 
    Coagulopathy with no risk of bleeding  10 (22.1)  2 (20)  8 (80)  0.029a 
    Coagulopathy with risk of bleeding  12 (26.7)  9 (75)  3 (25)  0.07a 

    FH, family history; NS, non-statistically significant differences.

    Data expressed as n (%).

    a

    Fisher's exact test.

    *

    Statistical significance of the differences between the group with and without a family history of bleeding.

Reason for referral:

  • This is summarised in Table 4.

    Table 4.

    Reason for the referral.

    Reason for the referral  Number of patients  Percentage 
    Prolonged APTT  33  70.2 
    No bleeding  20  66.6 
    Bleeding  13  39.4 
    Patients’ siblings attending follow-up visits due to coagulopathies  10  21.3 
    No bleeding  90 
    Bleeding  10 
    Bleeding with APTT and PA normal levels     
    Bleeding  4.3 
    Bleeding with reduced PA     
    Bleeding  4.3 

    PA, prothrombin activity; APTT, activated partial thromboplastin time.

Analysis per group is as follows:

  • -

    Prolonged APTT with no bleeding: 20 children. The final diagnosis was: 8 (40%) healthy children, 6 (30%) with factor xii deficiency (one of whom was diagnosed with lupus anticoagulant within a context of sepsis), 3 (15%) with vWD1, 1 (5%) with factor xi deficiency, another (5%) with deficiency of other contact factors (HMWK, prekallikrein) and lastly, 1 (5%) with factor ix deficiency.

  • -

    Prolonged APTT with bleeding: 13 children, although 1 was lost to follow-up. Below is a summary of the type of bleeding and of the final diagnosis:

    • (a)

      Epistaxis: 10 (77%). The final diagnosis was: 5 patients (50%) with vWD1 (1 of whom was diagnosed with lupus anticoagulant); 2 patients (20%) with factor xii deficiency; 2 (20%) were healthy.

    • (b)

      Haemorrhage at another level: 3 (23.1%). The final diagnosis was: 2 healthy children (66.7%), who had been referred due to haematemesis in 1 case and petechiae in the other case; and 1 patient with factor xii deficiency (33.3%). This patient had presented intraventricular haemorrhage within a prematurity context.

Excluding 1 patient that was lost to follow-up and 1 premature infant, 5 (45.5%) of the 11 patients referred due to an altered APTT and bleeding were diagnosed with coagulopathy with a high risk of bleeding. In the group of children with a prolonged APTT with no clinical symptoms of bleeding, 5 out of 20 (25%) were diagnosed with coagulopathy with a high risk of bleeding. These differences, however, are not statistically significant.

  • -

    Hereditary haemorrhagic disorder: 10 children. The final diagnoses were:

    • (a)

      Healthy: 9 (90%). Eight with no bleeding and one with occasional epistaxis.

    • (b)

      Factor XI deficiency: 1 patient (10%) with no bleeding.

  • -

    Bleeding with normal APTT and prothrombin activity (PA): 1 child was diagnosed with vWD1 after presenting capillary haemorrhage following a phimosis intervention. Another child, who was referred due to epistaxis and haemorrhage after a dental extraction, was not diagnosed with any alteration.

  • -

    Bleeding with reduced PA: 1 child with prolonged APTT with clinical symptoms of rectal bleeding was diagnosed with factor x deficiency caused by vitamin K deficiency. In another child with recurrent haematomas, no pathology was diagnosed.

Discussion

The results of the study showed that, in our Paediatric Haematology Unit, most of the children who were referred to rule out coagulopathy were referred due to prolonged APTT with no clinical haemorrhagic symptoms, and that 75% of these and 48.7% of the total of children under study were healthy.

Was the referral justified? Is it necessary to perform coagulation studies in patients with no bleeding history? Our findings show room for improvement in the protocols for referring patients to the Haematology Unit. When should basic coagulation analysis be performed? And which patients with altered times should have further analysis? Referrals from Surgery and Anaesthetics Units, together, represent the most frequent reason for consultation: APTT and PA studies are a part of the preoperative work-up without taking into consideration the patient's personal history or FH of bleeding.

The American Academy of Otolaryngology-Head and Neck Surgery recommends preoperative coagulation test only if a coagulopathy is suspected based on the patient's personal or family history.7 Likewise, the British Committee for Standards in Haematology recommended in 2008 obtaining a complete bleeding history instead of performing universal coagulation screening.8 Cooper et al. found not performing coagulation tests before amygdalectomy in children to be the most cost-effective strategy.9 After amygdalectomy, one of the most frequent interventions in children, Zagólski detected bleeding in several patients with previously normal coagulation tests, and none in patients with a previously altered APTT. These authors emphasise that the incidence of haemorrhage after an amygdalectomy does not increase in patients with a prolonged APTT, and a personal history of recurring epistaxis; haematomas after minor injury and prolonged haemorrhage after minor injuries are better predictors of postoperative bleeding.10 Hubner concluded that a detailed and supervised history has great predictive value in the diagnosis of coagulopathies. The absence of bleeding predicts that laboratory results will be normal in about 94% of the cases.11

Nevertheless, how would coagulopathies with no haemorrhage symptoms be diagnosed if no laboratory tests are performed? According to Bowman et al., the absence of bleeding in a child with vWD can be due to the lack of surgical interventions, dental extractions or menstruation that can provoke haemorrhage.4 In these cases, FH plays a crucial role in diagnosis. Furthermore, the diagnosis of certain coagulopathies, such as vWD, requires the presence of a positive FH.12

Our study design is too limited to allow us to draw conclusions on FH of bleeding. We can only state that an FH of bleeding was more common in the group of children diagnosed with coagulopathies and without a high risk of bleeding.

On average, 2 blood tests were performed per patient in our study, a rate consistent with other studies.13,14 Due to the fluctuating levels of von Willebrand factor (VWF:Ag), a repeat test is mandatory.13 Hyatt et al., in their revised study on children with vWD1, performed a minimum of 2 blood tests. Particular care is needed when drawing blood for follow-up tests in paediatric patients, due to the risk of secondary stress14; it should be borne in mind that stress, crying and anxiety increase vWF:Ag levels.15 Nevertheless, 2 separate blood tests are needed to confirm diagnosis of vWD, so at least 2 venipunctures must be performed.12

As for the type of bleeding, it is interesting to note that most children under study never presented with bleeding (61.7%). Current studies on the diagnosis of coagulopathies recommend a more restrictive approach to coagulopathy analyses to avoid false positives. They recommend adjusting and validating questionnaires on paediatric bleeding. This is crucial to avoid unnecessary studies in healthy children.16 Another remarkable finding is the existence of bleeding in 30.4% of the children classified as healthy. In this regard, it should be borne in mind that epistaxis and haematomas are common findings in healthy children.1

Three children diagnosed with vWD1 without bleeding were found. According to the International Society on Thrombosis and Haemostasis(ISTH), these cases would be classified as potential vWD1.17 As mentioned above, children with vWD1 might not have been subjected to a haemostatic challenge, and this could explain why they did not present with pathological bleeding.14

In our study, 33.3% of children with factor xii deficiency presented bleeding. Our interpretation is the same as in children with bleeding who were diagnosed as healthy: bleeding is frequent in children, regardless of a factor xii deficiency. The only case of haemophilia B did not exhibit bleeding, probably because the level of factor ix was 45%.

Regarding the frequency of coagulopathies, as expected, vWD1 (together with factor xii deficiencies) was the most frequent.

The diagnosis of vWD1 is still a challenge. Multiple factors, such as age, blood group, stress situations, inflammatory conditions and pregnancy itself, contribute to alterations in VWF:Ag plasma levels. Clinical symptoms vary among affected members of the same family.18 In addition, VWF:Ag plasma levels used as a cut point for diagnosis are controversial. Several cut points have been proposed, from 15% to 50%, with no consensus.17,19 Using a 40% cut point for both VWF:Ag and ristocetin co-factor seems to prevent both over- and under-diagnoses.20 However, the current laboratory criterion proposed by the ISTH is VWF:Ag levels below 20%.17 In addition to laboratory criteria, there must be a compatible FH and personal history. The diagnosis is definite if 3 criteria are fulfilled, and is only suggestive if some of the bleeding criteria, whether individual or family, are not fulfilled. In 2000, Dean et al. published a study comparing the application of these criteria in paediatrics: parents must register the exact duration of all haemorrhagic episodes; the existence of an FH could be underrated if the patient has younger siblings who have not undergone any haemostatic challenge; and the patient might not have exhibited significant bleeding due not having undergone haemostatic challenges.21

Hyatt et al. also stated that the ISTH17 and Hospital for Sick Children (HSC) criteria are too strict for children.14 These authors retrospectively reviewed cases diagnosed with vWD1 according to the criteria of the hospital's haematologist. Afterwards, they applied the current ISTH and HSC criteria: 20% were diagnosed with vWD1 according to the ISTH criteria, and 90% according to the HSC criteria. It is important to apply universal criteria to diagnose vWD1, and this has not been done in our unit. But even more importantly, the criteria must be adapted to children.

The greatest number of patients diagnosed with vWD1 were from the group with a prolonged APTT and clinical symptoms of bleeding, but there was a case from the group with normal APTT and PA with clinical symptoms: factor viii activity, and, consequently, APTT levels can be normal when VWF:Ag is higher than 35%.5

As for haemophilia A and B, in our series we diagnosed 1 haemophilia B case, without bleeding, with a factor ix >40%.5,22

Rare coagulation disorders represent between 3% and 5% of all coagulopathies. Factor vii deficiency is the most frequent disorder within this group, with a predominance of 1:500,000.23 However, in our series, the most common deficiency was factor xi deficiency (2 cases); no factor VII deficiencies were found. The high prevalence of factor XI deficiency could be due to the fact that one such patient, who was asymptomatic, was diagnosed following a diagnosis of this deficiency in a sibling. The factor X deficiency patient in our study was an acquired case.

The risk of bleeding in patients with rare coagulation disorders is less predictable than in haemophilia A and B.24

Prekallikrein, HMWK and factor xii deficiencies cause in vitro APTT prolongation, which is not associated with a higher risk of bleeding in vivo.25 In fact, some studies show that a factor xii deficiency increases the risk of venous thrombosis.26 Its prevalence in the general population is 2.3% and it could be the most frequent cause of an unexpected prolonged APTT during preoperative workup.27 There are no data in the paediatric population, probably due to its limited clinical manifestation. In our series, we found 10 patients with this disorder, 9 with factor xii deficiency and 1 with a deficiency of other contact factors, which represents a frequency of 21%. Diagnosis of these disorders will avoid complementary tests and unnecessary exposure to blood products.

Limitations

It would be necessary to perform a prospective study with a higher number of patients to be able to confirm these conclusions satisfactorily.

Another limitation lies in the diagnosis of vWD1. We did not use the current criteria published by ISTH or HSC. Fc:VIII, ristocetin co-factor and VWF:Ag of 45% were considered pathological. This threshold is higher than that recommended in the literature. In addition, we did not take into consideration the blood group to adjust the levels of VWF:Ag. It is possible that these circumstances have generated an over-diagnosis of vWD1.

Conclusions

The most frequent reason to initiate a coagulopathy analysis has been the existence of a prolonged APTT with no clinical symptoms of haemorrhage. More restrictive protocols may be needed in services referring patients for coagulopathy studies. It would be helpful to use questionnaires on bleeding adapted to children and perform thorough physical examinations and personal/family history, looking for signs that point to pathological bleedings.

It is important to be familiar with bleeding patterns in children in order to avoid false coagulopathy diagnoses.

Although the topic is beyond the scope of this study, we believe that no universally accepted criteria for the diagnosis of vWD have yet been established.

Finally, clinical symptoms must always correlate with laboratory results: normal levels of APTT and PA with pathological bleeding require further analyses.

Conflict of interests

The authors declare that there are no conflicts of interest.

References
[1]
B. Nosek-Cenkowska, M.S. Cheang, N.J. Pizzi, E.D. Israels, J.M. Gerrard.
Bleeding/bruising symptomatology in children with and without bleeding disorders.
Thromb Haemost, 65 (1991), pp. 237-241
[2]
F. Rodeghiero, G. Castaman, E. Dini.
Epidemiological investigation of the prevalence of von Willebrand's disease.
Blood, 69 (1987), pp. 454-459
[3]
E.J. Werner, E.H. Broxson, E.L. Tucker, D.S. Giroux, J. Shults, T.C. Abshire.
Prevalence of von Willebrand disease in children: a multiethnic study.
J Pediatr, 123 (1993), pp. 893-898
[4]
M. Bowman, W.M. Hopman, D. Rapson, D. Lillicrap, M. Silva, P. James.
A prospective evaluation of the prevalence of symptomatic von Willebrand disease in a pediatric primary care population.
Pediatr Blood Cancer, 55 (2010), pp. 171-173
[5]
R. Kumar, M. Carcao.
Inherited abnormalities of coagulation.
Pediatr Clin North Am, 60 (2013), pp. 1419-1441
[6]
K.G. Mann.
Biochemistry and physiology of blood coagulation.
Thromb Haemost, 2 (1999), pp. 165
[7]
American Academy of Otolaryngology-Head and Neck Surgery.
Clinical indicators compendium.
American Academy of Otolaryngology-Head and Neck Surgery, (1999),
[8]
Y.L. Chee, J.C. Crawford, H.G. Watson, M. Greaves, British Committee for Standards in Haematology.
Guidelines of the assessment of bleeding risk prior to surgery or invasive procedures.
Br J Haematol, 140 (2008), pp. 496-550
[9]
J.D. Cooper, K.J. Smith, A.K. Ritchey.
A cost-effectiveness analysis of coagulation testing prior to tonsillectomy and adenoidectomy in children.
Pediatr Blood Cancer, 55 (2010), pp. 1153-1159
[10]
O. Zagólski.
Hemorragia postamigdalectomía: ¿tienen las pruebas de coagulación y el historial de coagulopatía un valor predictivo?.
Acta Otorrinolaringol Esp, 61 (2010), pp. 287-292
[11]
G. Hubner.
Utilidad de la anamnesis en la detección de trastornos de la coagulación.
Rev Chil Pediatr, 57 (1986), pp. 138-140
[12]
J.E. Sadler, F. Rodeghiero.
Provisional criteria for the diagnosis of VWD type 1.
J Thromb Haemost, 3 (2005), pp. 775-777
[13]
W.L. Nichols, M.B. Hultin, A.H. James, M.J. Manco-Johnson, R.R. Montgomery, T.L. Ortel, et al.
Von Willebrand disease: evidence-based diagnosis and management guidelines, the National Heart, Lung, and Blood Institute (NHLBI) Expert Panel report (USA).
Haemophilia, 14 (2008), pp. 171-232
[14]
S.A. Hyatt, W. Wang, B.A. Kerlin, S.H. O’Brien.
Applying diagnostic criteria for type 1 von Willebrand disease to a pediatric population.
Pediatr Blood Cancer, 52 (2009), pp. 102-107
[15]
M. Laffan, S.A. Brown, P.W. Collins, A.M. Cumming, F.G. Hill, D. Keeling, et al.
The diagnosis of von Willebrand disease: a guideline from the UK Haemophilia Centre Doctors’ Organization.
Haemophilia, 10 (2004), pp. 199-217
[16]
J.A. Shavit.
The bleeding edge of symptom assessment.
Pediatr Blood Cancer, 58 (2012), pp. 657-658
[17]
J.E. Sadler, U. Budde, J.C. Eikenboom, E.J. Favaloro, F.G. Hill, L. Holmberg, et al.
Update on the pathophysiology and classification of von Willebrand disease: a report of the Subcommitte on von Willebrand Factor.
J Thromb Haemost, 4 (2006), pp. 2103-2114
[18]
W.C. Nichols, D. Ginsburg.
Von Willebrand disease.
Medicine (Baltimore), 76 (1997), pp. 1-20
[19]
J. Robertson, D. Lillicrap, P.D. James.
Von Willebrand disease.
Pediatr Clin North Am, 55 (2008), pp. 377-392
[20]
A. Tosetto, G. Castaman, F. Rodeghiero.
Evidence-based diagnosis of type 1 von Willebrand disease: a Bayes theorem approach.
Blood, 111 (2008), pp. 3998-4003
[21]
J.A. Dean, V.S. Blanchette, M.D. Carcao, A.M. Stain, C.R. Sparling, J. Siekmann, et al.
Von Willebrand disease in a pediatric-based population – comparison of type 1 diagnostic criteria and use of the PFA-100 and a von Willebrand factor/collagen-binding assay.
Thromb Haemost, 84 (2000), pp. 401-409
[22]
J.S. Stonebraker, P.H. Bolton-Maggs, J. Michael Soucie, I. Walker, M. Brooker.
A study of variations in the reported haemophilia B prevalence around the world.
Haemophilia, 18 (2012), pp. e91-e94
[23]
F. Peyvandi, M. Spreafico.
National and international registries of rare bleeding disorders.
Blood Transfus, 6 (2008), pp. s45-s48
[24]
P.H. Bolton-Maggs.
The rare inherited coagulation disorders.
Pediatr Blood Cancer, 60 (2013), pp. S37-S40
[25]
M.C. Amigo Bello, J. Sevilla Navarro, L. Madero-López.
Trastornos de la coagulación en la edad pediátrica.
Pediatr Integral, VIII (2004), pp. 404-419
[26]
T. Kanaji, T. Okamura, K. Osaki, M. Kuroiwa, K. Shimoda, N. Hamasaki, et al.
A common genetic polymorphism (46 C to T substitution) in the 5′ untranslated region of the coagulation factor xii gene is associated with translation efficiency and decrease in plasma factor xii level.
Blood, 91 (1998), pp. 2010-2014
[27]
P.H.B. Bolton-Maggs.
Trastornos de la coagulación poco comunes.
Federación Mundial de Hemofilia, (2006),

Please cite this article as: Romero I, Conde N, Aldana DG, Ruano A, Fernández-Teijeiro A. Revisión de los pacientes estudiados por coagulopatía en una unidad de Oncohematología. An Pediatr (Barc). 2016;84:85–91.

Copyright © 2014. Asociación Española de Pediatría
Download PDF
Idiomas
Anales de Pediatría (English Edition)
Article options
Tools
es en

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?