Massive bleeding from large bowel.
D000368:Aged; D003106:Colon / Q000098:blood supply; D004108:Dilatation, Pathologic; D004241:Diverticulum, Colon / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007410:Intestinal Diseases / Q000209:etiology*; D007420:Intestine, Large; D008875:Middle Aged; D014652:Vascular Diseases / Q000150:complications