title: Aneurysm of the superior hemorrhoidal artery: an unusual cause of massive rectal bleeding.
abstract: A case of massive rectal hemorrhage from a previously unreported source is presented. Localization of the bleeding site was made angiographically after failure of proctoscopy to demonstrate the lesion. Careful evaluation of the rectal region in patients with massive hemorrhage is indicated.
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000150:complications*; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D012002:Rectal Diseases / Q000209:etiology*; D012007:Rectum / Q000098:blood supply*