KLK3 and posterior cortical atrophy: Eighty-eight PCa patients with Prostate-Specific Antigen (PSA) ≤ 20 ng/mL, clinical stage ≤ cT2, a dominant unilateral lesion with Gleason Score (GS) ≤ 7 (4 + 3), no contralateral Gleason ≥ 4 lesion and good preoperative sexual function were included.