We used a broad definition of PCa with the following secondary terms: prostate cancer cells, prostate cancer risk, Gleason, androgen-independent, prostatic neoplasms, Gleason score, prostatectomy, metastatic prostate, human prostate cancer, radical prostatectomy, androgen-independent prostate, advanced prostate, prostate-specific antigen, primary prostate, benign prostate, prostate tumors, prostate-specific, prostate carcinogenesis, and benign prostatic. This evidence concerns the gene KLK3 and prostate cancer.