title: Lower gastrointestinal bleeding.
abstract: Lower gastrointestinal bleeding remains an important medical emergency. Most lower gastrointestinal bleeding is now known to come from angiodysplasia or diverticular disease. Accurate angiographic and colonoscopic diagnosis may lead to a better focus for treatment and improved survival.
mesh_terms: D001165:Arteriovenous Malformations / Q000150:complications; D003106:Colon / Q000098:blood supply; D003108:Colonic Diseases; D004241:Diverticulum, Colon / Q000150:complications; D004630:Emergencies; D006471:Gastrointestinal Hemorrhage / Q000209:etiology; D006801:Humans