KLK3 and cancer: These TAAs can be grouped into distinct classes, including overexpressed proteins like MUC1, survivin, Ep-CAM, WT1, TAL6, and HER2/Neu; differentiation antigens, such as tyrosinase and prostate-specific antigen (PSA); and cancer/testis antigens like NY-ESO-1 and members of the MAGE family [125].