title: Radiology in investigation of rectal bleeding.
abstract: Although most causes of chronic anorectal bleeding are diagnosed from clinical or sigmoidoscopic examination, there are a number of conditions not detectable from barium enema studies. Results of colonoscopy are compared to those for single- and double-contrast barium enema examinations, and recommendations are made for increasing diagnostic accuracy.
mesh_terms: D001466:Barium Sulfate; D003092:Colitis / Q000175:diagnosis / Q000000981:diagnostic imaging; D004241:Diverticulum, Colon / Q000175:diagnosis / Q000000981:diagnostic imaging; D004733:Enema; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging*; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis / Q000000981:diagnostic imaging; D011859:Radiography; D012002:Rectal Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging*; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging; D012812:Sigmoidoscopy
chemical_list: D001466:Barium Sulfate