A 64-year-old Afro-Caribbean man diagnosed with Gleason 6 (3 + 3) adenocarcinoma of the prostate involving 5% of 1 of 12 cores arising from the left lobe of the prostate and with a prebiopsy PSA level of 8.59 ng/mL (June 13, 2014) and cT1c (clinically benign) prostate on digital rectal examination (DRE) went on a regime of active surveillance after diagnosis on July 14, 2014. Here, KLK3 is linked to prostate adenocarcinoma.