title: Crohn's disease presenting with massive lower gastrointestinal hemorrhage.
mesh_terms: D000368:Aged; D003424:Crohn Disease / Q000150:complications / Q000000981:diagnostic imaging*; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging* / Q000209:etiology; D006801:Humans; D007082:Ileum / Q000473:pathology; D008297:Male; D011859:Radiography