title: Medical image. An unusual bowel obstruction.
mesh_terms: D000368:Aged; D002769:Cholelithiasis / Q000150:complications*; D042882:Gallstones / Q000000981:diagnostic imaging*; D006801:Humans; D045823:Ileus / Q000000981:diagnostic imaging* / Q000209:etiology; D007415:Intestinal Obstruction / Q000000981:diagnostic imaging* / Q000209:etiology; D008297:Male; D011859:Radiography; D012810:Sigmoid Diseases / Q000000981:diagnostic imaging* / Q000209:etiology