In fact, PSCA and PSMA are promising TAAs for prostate cancer [98] but neither is restricted to prostate tissue: PSCA is expressed in prostate tumors but also in the bladder, kidney, and other organs [99], while PSMA is expressed in metastatic prostate cancer but also in type II astrocytes, the kidney, and other organs [100]. Here, FOLH1 is linked to metastatic prostate carcinoma.