title: [Extra skeletal Ewing's sarcoma. Report of two cases. Ultrastructural study of one case (author's transl)].
abstract: The authors report two cases of extra skeletal Ewing's sarcoma. The first case concerns a 26 years old woman presenting a tumor at the level of the sacrum area, locally recurrent, metastazing to the lungs and the lumbar column, despite of radiotherapy and chemotherapy and leading to death after a course of 18 months. The second one is that of a 30 years old man bearing a tumor of the shoulder area probably already metastazed to bones, rapidly recurrent and metastazing to the lungs and cause of death after 9 months in spite of intensive therapy. About these 2 observations a review of the literature of the cases of extra skeletal Ewing's sarcoma is done. Whatever nosologic discussion it seems that Ewing's sarcoma may present essentially as a tumor of soft tissues. An ultrastructural study has been performed in the second case. The findings are similar to those reported in Ewing's sarcoma.
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000648:ultrastructure; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000556:secondary / Q000648:ultrastructure; D008297:Male; D011859:Radiography; D012445:Sacrococcygeal Region; D012512:Sarcoma, Ewing / Q000000981:diagnostic imaging / Q000648:ultrastructure*; D012782:Shoulder; D012983:Soft Tissue Neoplasms / Q000648:ultrastructure
vernacular_title: Les sarcomes d'Ewing extra-osseux. A propos de deux observations dont l'une avec étude ultrastructurale.