title: Extraskeletal Ewing's sarcoma.
abstract: A well documented case of extraskeletal Ewing's sarcoma arising in a finger of a 16-year-old man was studied by light microscopy, immunohistochemistry and electron microscopy. The differential diagnoses of similar "round cell neoplasms" are discussed. Emphasis is placed on the distinction between extraskeletal Ewing's sarcoma and peripheral neuroepithelioma.
mesh_terms: D000293:Adolescent; D003937:Diagnosis, Differential; D005383:Finger Injuries / Q000150:complications; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D018241:Neuroectodermal Tumors, Primitive, Peripheral / Q000175:diagnosis; D012512:Sarcoma, Ewing / Q000175:diagnosis / Q000473:pathology*