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Vol. 60. Issue 4.
Pages 373-375 (1 April 2004)
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Vol. 60. Issue 4.
Pages 373-375 (1 April 2004)
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Miositis osificante circunscrita axilar
Myositis ossificans circumscripta in the axilla
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J.L. Alonso Calderón
Corresponding author
cirped@hnjs.insalud.es

Servicio de Cirugía Pediátrica. Hospital Infantil Universitario del Niño Jesús. Avda. Menéndez Pelayo, 65. 28009 Madrid. España
, J. Delgado Valdueza, I. Deprada Vicente
Hospital Infantil Universitario del Niño Jesús. Madrid. España
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La miositis osificante circunscrita (MOC) es un proceso benigno raro y hereditario de formación heterotópica de hueso en tejidos blandos y músculo, rara vez encontrada en la infancia. Su localización más frecuente son las extremidades. Se presenta una adolescente de 15 años que sin traumatismo previo presentó una tumoración en axila. Las pruebas de imagen practicadas (radiografía simple, ecografía) no permiten establecer el diagnóstico, ni tampoco excluir malignidad. La biopsia de la tumoración y el estudio histopatológico permitió alcanzar el diagnóstico de miositis osificante circunscrita. En algunos artículos publicados se sugiere que la resonancia magnética (RM) es la primera herramienta en el diagnóstico precoz de esta entidad y evitar la intervención quirúrgica; sin embargo, en muchos casos todavía el diagnóstico es histológico. Debe diferenciarse sobre todo de procesos malignos (sarcomas) y de la fibrodisplasia osificante progresiva. La MOC tiene un buen pronóstico en la infancia

Palabras clave:
Miositis osificante circunscrita
Axila
Biopsia

Myositis ossificans circumscripta (MOC) is a rare benign hereditary disorder characterized by heterotopic bone formation in soft tissue and muscle. This disorder is rarely seen in childhood. MOC is most commonly located in the extremities. We describe a 15-year-old girl with nontraumatic MOC in the axilla. Imaging studies (radiographic, ultrasound) did not provide the correct diagnosis and did not rule out malignancy. Incisional biopsy of the mass and histopathologic examination gave the diagnosis of MOC. Some reports suggest that magnetic resonance imaging may be the first-choice diagnostic option and may avoid unnecessary biopsy. However, in many cases diagnosis is still histological. Differential diagnosis between these lesions and malignant sarcomas and fibrodysplasia ossificans progressiva is required. This entity has a good prognosis in childhood

Keywords:
Myositis ossificans circumscripta
Axilla
Biopsy
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Copyright © 2004. Asociación Española de Pediatría
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