Stone formation in the prostatic urethra after cryotherapy for prostate cancer.

We report on 3 cases of stone formation in the prostatic urethra after cryosurgical ablation of the prostate. This complication occurred late in the course, many months after the normal postoperative healing process apparently was finished and patients enjoyed normal voiding. Transrectal ultrasound proved to be useful in making the diagnosis. Treatment included lithotripsy and cold resection of residual dead tissue.