title: Abdominal scanning with Tc-99m red blood cells. False-positive study due to ectopic kidney.
abstract: Abdominal scanning with Tc-99m red blood cells performed in a patient with gastrointestinal bleeding demonstrated a localized area of increased activity in the pelvic region that simulated either bleeding in a mass or encapsulated bleeding. Contrast angiography confirmed that the bleeding was due to a right ectopic kidney.
mesh_terms: D000368:Aged; D004912:Erythrocytes; D005189:False Positive Reactions; D005260:Female; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging*; D006801:Humans; D007668:Kidney / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging; D013667:Technetium
chemical_list: D013667:Technetium