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Arch. venez. pueric. pediatr ; 80(2): 58-61, jun. 2017. ilus
Article in Spanish | LILACS | ID: biblio-887826

ABSTRACT

Liposarcomas, tumores adiposos propios en edad adulta, excepcional en niños, reportándose solo el 6% de los casos en la 2da década de la vida, dos tercios son lipomas, 30% lipoblastomas y 2% liposarcomas. Lactante menor de 10 meses con aumento de volumen progresivo en región gemelar derecha de 3 meses de evolución, masa palpable de 10,5 x 19 cm, renitente, no dolorosa, bordes definidos, circulación colateral, funcionalidad normal. Ecosonogramas: no concluyente. Biopsia insicional: fibrolipomas adultos diferenciados. Biopsia excisional: tumor lipomatoso gigante con patrón mixoide consono con lipoma. Inmunohistoquimico: liposarcoma de bajo grado, positivo para proteína s-100.


Liposarcoma, fatty tumors described in adults, rare in children, reporting only 6% of cases in the 2nd decade of life, two-thirds are lipomas, 30% lipoblastomas and 2% liposarcoma. A 10 month old infant with progressive increase of the right gastrocnemius region with a 3 months evolution, with palpable mass of 10.5 x 19 cm, painless, defined borders, collateral circulation and normal functionality. Ecosonograms: inconclusive. Incisional biopsy reports: differentiated adult fibrolipomas. Excisional biopsy reports: giant lipomatous tumor with myxoid pattern consistent with lipoma. Immunohistochemical reports: low-grade liposarcoma positive for s-100 protein.

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