KLK3 and abscess: Blood analyses revealed a white blood cell (WBC) count of 15,350/μl and a prostate-specific antigen (PSA) level of 2.9 ng/ml. The patient was initiated on the alpha-blocker silodosin; however, he had a recurrence of urinary retention, necessitating the placement of an indwelling urethral catheter. Although MSSA was isolated from urine culture, antimicrobial chemotherapy was not administered due to the absence of fever, the normal level of PSA, and lack of awareness of the presence of an abscess.