title: "Inverted" diverticulum mimicking an ulcerated duodenal tumour.
mesh_terms: D003937:Diagnosis, Differential; D004240:Diverticulum / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004378:Duodenal Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004379:Duodenal Neoplasms / Q000175:diagnosis*; D004384:Duodenoscopy; D006801:Humans; D007889:Leiomyoma / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014456:Ulcer / Q000175:diagnosis