Staphylococcus periprostatic abscess: an unusual cause of acute urinary retention.

Prostatic abscess has occasionally been known to present with urinary retention. We report an unusual case of a Staphylococcus aureus periprostatic abscess causing acute urinary retention. Diagnosis was made by transrectal sonogram and computed tomography scan, and the patient was treated successfully with intravenous antibiotics, perineal exploration, and drainage.