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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivos</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Determinar la prevalencia al nacimiento de los defectos del tubo neural &#40;DTN&#41; en poblaci&#243;n espa&#241;ola&#44; tanto en su conjunto como clasificados seg&#250;n el fallo de los distintos puntos de cierre&#44; aplicando la teor&#237;a del cierre m&#250;ltiple del tubo neural&#46; Analizar las caracter&#237;sticas epidemiol&#243;gicas de &#233;stos&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todos</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Se han utilizado los datos del Estudio Colaborativo Espa&#241;ol de Defectos Cong&#233;nitos &#40;ECEMC&#41; correspondientes al per&#237;odo comprendido entre abril de 1976 y marzo de 1995&#44; en el que se han detectado 784 reci&#233;n nacidos con un DTN entre un total de 1&#46;222&#46;698 reci&#233;n nacidos vivos&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Nuestra poblaci&#243;n tiene una prevalencia de DTN de 1&#44;01 por 1&#46;000 nacimientos&#46; Solamente el 5&#44;74 &#37; de los DTN diagnosticados tienen una etiolog&#237;a conocida&#44; g&#233;nica &#40;2&#44;17&#37;&#41;&#44; cromos&#243;mica &#40;1&#44;27 &#37;&#41; y ambiental &#40;2&#44;29 &#37;&#41;&#46; Una vez excluidos los DTN de origen g&#233;nico y cromos&#243;mico&#44; los restantes se presentan cl&#237;nicamente como DTN aislados &#40;propiamente multifactoriales&#41; en su mayor&#237;a y en menor proporci&#243;n &#40;16&#44;78 &#37;&#41; como polimalformados&#46; El punto 1&#44; el inicio del cierre del tubo neural es el que causa m&#225;s DTN por fallo en el propio cierre&#44; casi la cuarta parte del total&#46; Sin embargo&#44; m&#225;s de la mitad de los DTN se producen en la zona donde dos cierres confluyen&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Al igual que en otras poblaciones con baja prevalencia de DTN de nacimiento&#44; se ha observado una disminuci&#243;n al nacimiento de estos defectos&#44; coincidente con la posibilidad de aborto tras diagn&#243;stico prenatal&#46; Todos los DTN se han podido clasificar aplicando la teor&#237;a del cierre m&#250;ltiple del tubo neural&#44; incluidos 13 pacientes con DTN por afectaci&#243;n de varios puntos de cierre no contiguos&#46; Se observan dos distribuciones de los DTN&#44; una en la que el fallo de cierre se produce propiamente en el &#225;rea del punto de cierre&#44; y otra resultante del fallo de dos cierres para encontrarse&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objectives</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">To identify the frequency at birth of neural tube defects &#40;NTD&#41; in the Spanish population&#46; NTDs were considered as a whole as well as according to the different sites of closure failure&#44; following the theory of multi-site closure of the neural tube&#46; To analyze the epidemiological characteristics of the different sites&#46;</p> <span class="elsevierStyleSectionTitle">Methods</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Data derived from the Spanish Collaborative Study of Congenital Malformations &#40;ECEMC&#41;&#44; from April 1976 to March 1995&#46; Among the 1&#44;222&#44;698 live births during this period&#44; 784 infants had NTD were controlled&#46; Among these&#44; 784 infants had NTD&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">The prevalence of NTD in our population was 1&#46;01 per 1&#44;000 births&#44; a frequency which is considered mediumto-low&#46; Only 5&#46;74 &#37; of the NTD were of known etiology&#58; 2&#46;17 &#37; were genic&#44; 1&#46;27 &#37; were chromosomic and 2&#46;29&#37; were environmental&#46; Excluding NTD of genetic etiology&#44; whether genic or chromosomic&#44; most of the remaining were isolated defects &#40;multifactorial&#41; and 16&#46;78 &#37; multiple malformations&#46; Site 1&#44; where the closure of the neural tube starts&#44; represented 24 &#37; of all the affected sites&#46; However&#44; more than 50 &#37; of the NTDs corresponded to closure failure at the junction of two sites&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">As in other populations with a low prevalence of NTD at birth&#44; the prevalence of these defects in our population showed a trend to decrease with time&#44; due to the possibility of interrupting gestation after prenatal diagnosis&#46; All the NTD could be classified according to the theory of multi-site closure of the neural tube&#44; including 13 cases with several non-contiguous affected sites&#46; Two types of NTD were observed&#58; in the first&#44; closure failed to occur and in the second&#44; two closures failed to meet&#46;</p>"
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Estudio clínico epidemiológico de los defectos del tubo neural clasificados por los cinco puntos de cierre del mismo
Clinic-epidemiological study of neural tube defects classified according to the five sites of closure
A. Sanchis Calvoa,
Autor para correspondencia
mcsanchis@digitel.es

Correspondencia: Dra. A. Sanchis Calvo. Servicio de Pediatría. Hospital Universitario Dr. Peset. Valencia 46017.
, M.aL. Martínez-Fríasb
a Servicio de Pediatría. Hospital Universitario Dr. Peset. Valencia
b Estudio Colaborativo Español de Malformaciones Congénitas (ECEMC). Departamento de Farmacología. Facultad de Medicina. Universidad Complutense. Madrid
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objetivos</span><p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Determinar la prevalencia al nacimiento de los defectos del tubo neural &#40;DTN&#41; en poblaci&#243;n espa&#241;ola&#44; tanto en su conjunto como clasificados seg&#250;n el fallo de los distintos puntos de cierre&#44; aplicando la teor&#237;a del cierre m&#250;ltiple del tubo neural&#46; Analizar las caracter&#237;sticas epidemiol&#243;gicas de &#233;stos&#46;</p> <span class="elsevierStyleSectionTitle">Material y m&#233;todos</span><p id="spar0010" class="elsevierStyleSimplePara elsevierViewall">Se han utilizado los datos del Estudio Colaborativo Espa&#241;ol de Defectos Cong&#233;nitos &#40;ECEMC&#41; correspondientes al per&#237;odo comprendido entre abril de 1976 y marzo de 1995&#44; en el que se han detectado 784 reci&#233;n nacidos con un DTN entre un total de 1&#46;222&#46;698 reci&#233;n nacidos vivos&#46;</p> <span class="elsevierStyleSectionTitle">Resultados</span><p id="spar0015" class="elsevierStyleSimplePara elsevierViewall">Nuestra poblaci&#243;n tiene una prevalencia de DTN de 1&#44;01 por 1&#46;000 nacimientos&#46; Solamente el 5&#44;74 &#37; de los DTN diagnosticados tienen una etiolog&#237;a conocida&#44; g&#233;nica &#40;2&#44;17&#37;&#41;&#44; cromos&#243;mica &#40;1&#44;27 &#37;&#41; y ambiental &#40;2&#44;29 &#37;&#41;&#46; Una vez excluidos los DTN de origen g&#233;nico y cromos&#243;mico&#44; los restantes se presentan cl&#237;nicamente como DTN aislados &#40;propiamente multifactoriales&#41; en su mayor&#237;a y en menor proporci&#243;n &#40;16&#44;78 &#37;&#41; como polimalformados&#46; El punto 1&#44; el inicio del cierre del tubo neural es el que causa m&#225;s DTN por fallo en el propio cierre&#44; casi la cuarta parte del total&#46; Sin embargo&#44; m&#225;s de la mitad de los DTN se producen en la zona donde dos cierres confluyen&#46;</p> <span class="elsevierStyleSectionTitle">Conclusiones</span><p id="spar0020" class="elsevierStyleSimplePara elsevierViewall">Al igual que en otras poblaciones con baja prevalencia de DTN de nacimiento&#44; se ha observado una disminuci&#243;n al nacimiento de estos defectos&#44; coincidente con la posibilidad de aborto tras diagn&#243;stico prenatal&#46; Todos los DTN se han podido clasificar aplicando la teor&#237;a del cierre m&#250;ltiple del tubo neural&#44; incluidos 13 pacientes con DTN por afectaci&#243;n de varios puntos de cierre no contiguos&#46; Se observan dos distribuciones de los DTN&#44; una en la que el fallo de cierre se produce propiamente en el &#225;rea del punto de cierre&#44; y otra resultante del fallo de dos cierres para encontrarse&#46;</p>"
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        "resumen" => "<span class="elsevierStyleSectionTitle">Objectives</span><p id="spar0025" class="elsevierStyleSimplePara elsevierViewall">To identify the frequency at birth of neural tube defects &#40;NTD&#41; in the Spanish population&#46; NTDs were considered as a whole as well as according to the different sites of closure failure&#44; following the theory of multi-site closure of the neural tube&#46; To analyze the epidemiological characteristics of the different sites&#46;</p> <span class="elsevierStyleSectionTitle">Methods</span><p id="spar0030" class="elsevierStyleSimplePara elsevierViewall">Data derived from the Spanish Collaborative Study of Congenital Malformations &#40;ECEMC&#41;&#44; from April 1976 to March 1995&#46; Among the 1&#44;222&#44;698 live births during this period&#44; 784 infants had NTD were controlled&#46; Among these&#44; 784 infants had NTD&#46;</p> <span class="elsevierStyleSectionTitle">Results</span><p id="spar0035" class="elsevierStyleSimplePara elsevierViewall">The prevalence of NTD in our population was 1&#46;01 per 1&#44;000 births&#44; a frequency which is considered mediumto-low&#46; Only 5&#46;74 &#37; of the NTD were of known etiology&#58; 2&#46;17 &#37; were genic&#44; 1&#46;27 &#37; were chromosomic and 2&#46;29&#37; were environmental&#46; Excluding NTD of genetic etiology&#44; whether genic or chromosomic&#44; most of the remaining were isolated defects &#40;multifactorial&#41; and 16&#46;78 &#37; multiple malformations&#46; Site 1&#44; where the closure of the neural tube starts&#44; represented 24 &#37; of all the affected sites&#46; However&#44; more than 50 &#37; of the NTDs corresponded to closure failure at the junction of two sites&#46;</p> <span class="elsevierStyleSectionTitle">Conclusions</span><p id="spar0040" class="elsevierStyleSimplePara elsevierViewall">As in other populations with a low prevalence of NTD at birth&#44; the prevalence of these defects in our population showed a trend to decrease with time&#44; due to the possibility of interrupting gestation after prenatal diagnosis&#46; All the NTD could be classified according to the theory of multi-site closure of the neural tube&#44; including 13 cases with several non-contiguous affected sites&#46; Two types of NTD were observed&#58; in the first&#44; closure failed to occur and in the second&#44; two closures failed to meet&#46;</p>"
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ISSN: 16954033
Idioma original: Español
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