A 75-year-old Japanese male (height, 157 cm; body weight, 50 kg; body surface area, 1.48 m2) with a medical history of TB since 16 years of age had been treated for PC (initial prostate-specific antigen 532 ng/ml; cT4N1M1b; Gleason score 4+4) with androgen deprivation therapy, abiraterone, and docetaxel. This evidence concerns the gene KLK3 and tuberculosis.