Angiodysplasia.
D000368:Aged; D002908:Chronic Disease; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D007413:Intestinal Mucosa / Q000098:blood supply*; D008833:Microcirculation; D009626:Terminology as Topic; D014652:Vascular Diseases / Q000150:complications*