KLK3 and posterior cortical atrophy: In our study, 33231 patients with high-grade PCa were grouped according to their PSA levels (<4.0 ng/ml, 4.0-10.0 ng/ml, 10.1-20.0 ng/ml, >20.0 ng/ml) and T stages (T1, T2, T3a and T3b-T4).