Regarding the urinary system, PSMA expression was detected in the normal bladder urothelium, although it was much weaker than in prostate-derived tissues, and in different subtypes of bladder carcinoma (such as urothelial carcinoma, squamous cell carcinoma, adenocarcinoma and small cell carcinoma), either on the endothelial cells of tumor vessels or on tumor cells [97,98]. This evidence concerns the gene FOLH1 and neoplasm.