title: Intra-abdominal hemangiopericytoma. Report of four cases and review of the literature.
mesh_terms: D000008:Abdominal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D000328:Adult; D000368:Aged; D001859:Bone Neoplasms; D004379:Duodenal Neoplasms / Q000601:surgery; D006393:Hemangiopericytoma / Q000473:pathology; D006801:Humans; D007414:Intestinal Neoplasms / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D010180:Pancreatectomy; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery