Sigmoidoscopic differentiation of colonic bleeding.
D003108:Colonic Diseases / Q000175:diagnosis*; D003110:Colonic Neoplasms / Q000175:diagnosis*; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D007411:Intestinal Diseases, Parasitic / Q000175:diagnosis*; D012812:Sigmoidoscopy