[Prostatic cancer after transurethral resection for benign prostatic hypertrophy].

Five cases of prostatic cancer developed after transurethral resection of prostate for benign hypertrophy are reported. Duration of transurethral resection of prostate (TUR-P) to diagnosis of prostatic cancer ranged from one year and seven months to seven years and two months, on average four years and seven months and frequency of prostatic cancer after TUR-P was estimated at 1.2%. Four of five patients complained of macroscopic hematuria. The cystourethrogram showed the mass protruded in the dilated prostatic urethra or bladder-neck in four patients (80%), a remarkable finding, and four cases were at stage D. Risk of development of prostatic cancer is not decreased even after prostatectomy and prostatic carcinoma diagnosed after TUR-P often advances in stage. Therefore, periodical examinations of the patients who had a prior prostatectomy are very important.