Colonoscopy in acute rectal bleeding.
D000208:Acute Disease; D003092:Colitis / Q000175:diagnosis; D003108:Colonic Diseases / Q000175:diagnosis*; D003110:Colonic Neoplasms / Q000175:diagnosis; D003113:Colonoscopy; D003937:Diagnosis, Differential; D004241:Diverticulum, Colon / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D007417:Intestinal Polyps / Q000175:diagnosis; D012007:Rectum