A total of 40 patients with stages A2 to C prostatic cancer were treated with leuprorelin acetate depot once a month for 2 months before being treated by pelvic irradiation or radical prostatectomy. In the 32 patients who were evaluable, seven (22%) were classified as minor responders after leuprorelin treatment and 23 (72%) as major responders when assessed by rectal examination. Prostate-specific antigens also returned to normal concentrations (5 ng/ml) in 26/31 (84%) patients. Leuprorelin acetate depot suppressed plasma testosterone concentrations to castration values during treatment, but concentrations returned to normal 2 months after completion of treatment. Following radical treatment, there were three deaths--one postoperative and two due to recurrent disease--but there was no isolated local relapse. It is concluded that the protocol was locally well tolerated and was effective in the treatment of stages B2 and C prostatic cancer patients.
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