title: Obscure gastrointestinal bleeding.
abstract: Modern diagnostic techniques have led to increased accuracy in the diagnosis of gastrointestinal bleeding. Occasionally, however, the source of bleeding remains obscure. A careful, step-wise approach, is required to provide a diagnosis in these cases.
authors.affiliation: University of Texas Southwestern Medical Center, Dallas.
authors.forename: W L
authors.initials: WL
authors.lastname: Peterson
mesh_terms: D000465:Algorithms; D001018:Aortic Diseases / Q000150:complications / Q000175:diagnosis; D001808:Blood Vessels / Q000002:abnormalities; D005402:Fistula / Q000150:complications / Q000175:diagnosis; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000209:etiology; D006801:Humans; D007410:Intestinal Diseases / Q000150:complications / Q000175:diagnosis; D007412:Intestinal Fistula / Q000150:complications / Q000175:diagnosis; D007422:Intestines / Q000098:blood supply; D011859:Radiography; D014652:Vascular Diseases / Q000150:complications / Q000175:diagnosis