title: Retroperitoneal sarcoma with features suggestive of alveolar soft part sarcoma.
abstract: A 72-year-old man presented with a 15 x 12 x 5 cm cystic and necrotic tumor involving the superior region of the stomach and the retroperitoneum down to the transverse colon and extending laterally from the left lobe of the liver to the spleen without involving either organ. Light microscopy showed the tumor cells to be arranged in an organoid pattern. Immunocytochemistry showed a strong reaction for desmin and vimentin. Electron microscopy demonstrated features suggestive of an alveolar soft part sarcoma.
authors.affiliation: Department of Pathology, Medical Dental Research, University of Louisville, Kentucky 40292.
authors.forename: P H
authors.initials: PH
authors.lastname: Carstens
mesh_terms: D000368:Aged; D002471:Cell Transformation, Neoplastic / Q000473:pathology / Q000648:ultrastructure; D003893:Desmin / Q000032:analysis; D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008854:Microscopy, Electron; D009130:Muscle, Smooth / Q000737:chemistry / Q000473:pathology / Q000648:ultrastructure; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000473:pathology* / Q000648:ultrastructure; D012509:Sarcoma / Q000175:diagnosis / Q000473:pathology* / Q000648:ultrastructure; D014746:Vimentin / Q000032:analysis
chemical_list: D003893:Desmin; D014746:Vimentin