title: Colonic gallstone obstruction: routes of entry.
mesh_terms: D001658:Biliary Fistula / Q000000981:diagnostic imaging*; D002769:Cholelithiasis / Q000150:complications*; D003108:Colonic Diseases / Q000209:etiology*; D006801:Humans; D007412:Intestinal Fistula / Q000000981:diagnostic imaging*; D007415:Intestinal Obstruction / Q000209:etiology*; D011859:Radiography