KLK3 and posterior cortical atrophy: Biochemical recurrence defined by an increase of prostate specific antigen (PSA) serum level above 0.2ng/mL after radical prostatectomy (RP) or nadir value +2ng/mL after external beam radiotherapy (EBRT) occurs in 27 to 53% of PCa patients within 10 years after initial treatment with curative intent, like radical prostatectomy RP or EBRT [2].