The visible vessel and gastrointestinal hemorrhage.
D001158:Arteries; D004724:Endoscopy; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis*; D006801:Humans; D010438:Peptic Ulcer Hemorrhage / Q000175:diagnosis; D010439:Peptic Ulcer Perforation / Q000175:diagnosis; D013927:Thrombosis / Q000175:diagnosis