Defining the clinical problem of massive rectal bleeding.
D001165:Arteriovenous Malformations / Q000150:complications / Q000473:pathology; D002429:Cecal Diseases / Q000473:pathology; D003092:Colitis / Q000150:complications; D003106:Colon / Q000098:blood supply; D004240:Diverticulum / Q000150:complications / Q000473:pathology; D004381:Duodenal Ulcer / Q000150:complications; D004947:Esophagus / Q000098:blood supply; D006471:Gastrointestinal Hemorrhage / Q000209:etiology* / Q000473:pathology; D006222:Hamartoma / Q000150:complications / Q000473:pathology; D006801:Humans; D007511:Ischemia / Q000150:complications; D008467:Meckel Diverticulum / Q000473:pathology; D010437:Peptic Ulcer / Q000473:pathology; D010438:Peptic Ulcer Hemorrhage / Q000209:etiology; D012002:Rectal Diseases / Q000473:pathology; D012007:Rectum; D012812:Sigmoidoscopy; D013683:Telangiectasia, Hereditary Hemorrhagic / Q000150:complications; D014456:Ulcer / Q000150:complications