After discussing the mechanism of action of antioestrogens and medroxy-progesterone-acetate, the authors report on their experience with the sequential use of these two hormones in a group of patients with advanced cancer of the breast. After illustrating the results of their study, the authors conclude by stressing that the sequential use of these drugs appears to improve the quality of life of the patients with a significant increase in rates of complete or partial remission of the neoplastic disease.

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