title: Anorectal bleeding vs penile activity. A potential diagnostic problem.
abstract: Intrapenile blood pool activity may be a source of artefact in interpreting a gastrointestinal bleeding study employing Tc-99m sulfur colloid or erythrocytes. Proper positioning should avoid a false reading of rectal bleeding.
mesh_terms: D004912:Erythrocytes; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D010413:Penis / Q000098:blood supply / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012007:Rectum; D013455:Sulfur; D013667:Technetium; D013671:Technetium Tc 99m Sulfur Colloid
chemical_list: D013671:Technetium Tc 99m Sulfur Colloid; D013455:Sulfur; D013667:Technetium