KLK3 and prostate cancer: Background/Objectives: The aim of this study was to demonstrate the importance of 68Gallium (68Ga)–prostate specific membrane antigen (PSMA)–positron emissions tomography (PET)/computed tomography (CT)(PET/CT) in prostate cancer patients for therapy management with individual analyses regarding the Gleason score, prostate specific antigen (PSA) value, and the risk groups defined by D’Amico.