Tc-99m MDP uptake in a calcified bladder tumor.

A 68-year-old man with a history of prostate carcinoma and increasing levels of prostate-specific antigen was referred for a radionuclide bone scan. In addition to a probable metastatic lesion in the right femoral head, focal radiotracer accumulation was seen overlying the left aspect of the urinary bladder. Plain radiographs and pelvic computed tomography confirmed the presence of a calcified mass in the bladder. Cystoscopic examination revealed an exophytic bladder lesion. Biopsy indicated low-grade papillary transitional cell carcinoma, and the patient successfully underwent transurethral resection of this tumor.