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Abstract
In a prospective, randomized open study, a long-acting LHRH agonist (Zoladex®) was compared with polyoestradiol phosphate (Estradurin®), both widely used in Finland for palliative treatment of prostatic carcinoma, as regards efficacy and side effects. Of the 236 enrolled patients, 129 were randomized to receive LHRH agonist and 107 to oestrogen treatment. The median follow-up was 25 months. Reduction of prostatic volume was quicker and more effective in the LHRH than in the oestrogen group, and serum testosterone concentrations fell to castration level after 1 month and 1 year, respectively. In locally advanced (M0) and histologically well or moderately differentiated tumours, LHRH agonist therapy was considerably more effective than oestrogen as regards time to progression of the carcinoma, but in metastatic (M1) and histologically poorly differentiated tumours both methods gave similar results. Cardiovascular complications showed equal incidence in both groups. LHRH agonist therapy thus seemed to be more effective than polyoestradiol phosphate against locally advanced prostatic cancer in the doses used.