title: A large retroperitoneal lipoma.
mesh_terms: D006801:Humans; D008067:Lipoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*