title: Aortocaval fistula.
mesh_terms: D000368:Aged; D001018:Aortic Diseases / Q000150:complications*; D001164:Arteriovenous Fistula / Q000150:complications*; D006396:Hematemesis / Q000209:etiology*; D006801:Humans; D008297:Male; D014684:Venae Cavae