Fibroid Uterus Confounding the Correct Localization of Active Gastrointestinal Bleeding During Tc-99m RBC Scan

The unexpected visualization of the normal or pathologic uterus has been reported in the radionuclide imaging literature. Occasionally, this may create a diagnostic dilemma during interpretation of Tc-99m RBC scans, bone scans, or renal scans and additional imaging modalities are usually necessary to further define the abnormality. We report an interesting case of fibroid uterus identified as an intense, heterogeneous, and persistent vascular pelvic mass during a Tc-99m RBC scan in a patient with concomitant active lower gastrointestinal hemorrhage.