Massive colonic hemorrhage.
D000792:Angiography; D003106:Colon / Q000098:blood supply; D003108:Colonic Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery*; D003113:Colonoscopy; D004630:Emergencies; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans