Massive pelvic hemangiopericytoma.
D000328:Adult; D003560:Cysts / Q000209:etiology; D006393:Hemangiopericytoma / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D008297:Male; D010386:Pelvic Neoplasms / Q000150:complications / Q000000981:diagnostic imaging* / Q000473:pathology; D011859:Radiography