Retroperitoneal fibrosis involving the duodenum.
D004378:Duodenal Diseases / Q000000981:diagnostic imaging / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012185:Retroperitoneal Fibrosis / Q000150:complications* / Q000000981:diagnostic imaging