FDG PET/CT in a Case With Primary Poorly Differentiated Urothelial-Type Adenocarcinoma of the Prostate.

Primary urothelial-type adenocarcinoma of the prostate is extremely rare. We describe FDG PET/CT findings in a case with primary poorly differentiated urothelial-type adenocarcinoma of the prostate with pelvic lymph node metastases. Both the prostate tumor and its metastatic lesions showed intense FDG uptake. The patient had normal serum prostate-specific antigen and elevated carcinoembryonic antigen levels, which may be helpful for the differential diagnosis.