[Retroperitoneal fibrosarcoma in a 2-year-old child].
D002675:Child, Preschool; D005260:Female; D005354:Fibrosarcoma / Q000151:congenital*; D006801:Humans; D012186:Retroperitoneal Neoplasms / Q000151:congenital*
Zabriushinnaia fibrosarkoma u dvukhletnego rebenka.