The influence of bilateral orchiectomy on volume changes of the prostate in men with advanced prostatic cancer--the predictive value.

The changes of prostatic volume were evaluated in 84 men with adenocarcinoma of the prostate treated by bilateral orchiectomy. In every case the greatest volume decrease was observed during the first month after castration. In 56 patients (66.6%), where the response to orchiectomy was better, the reduction of prostatic volume was considerably greater and diminished more rapidly than in the remaining 28 patients (33.3%), where the reaction to the treatment was worse.