Lower intestinal bleeding in the elderly.
D000367:Age Factors; D000368:Aged; D001803:Blood Transfusion; D003082:Colectomy; D003106:Colon / Q000098:blood supply*; D004108:Dilatation, Pathologic; D004241:Diverticulum, Colon / Q000150:complications* / Q000000981:diagnostic imaging / Q000601:surgery; D006471:Gastrointestinal Hemorrhage / Q000209:etiology / Q000601:surgery; D006801:Humans; D011859:Radiography