[Study on CAF + medroxyprogesterone acetate (MPA) therapy for advanced or recurrent breast cancer--comparison between...

To find the optimal dose of MPA for combined use with CAF therapy for advanced or recurrent breast cancer, a randomized comparative study with a MPA 1,200 mg group and 600 mg group was carried out multi-institutionally. The response rate of complete cases was 37.5% (12/32) in the 1,200 mg group and 36.6% (15/41) in the 600 mg group, showing no difference between the two groups. There were no differences in either the duration of response or the survival term. The major adverse effects and abnormal laboratory test values included alopecia, nausea and vomiting, general fatigue, anorexia and leukopenia, with no difference in incidence between the groups. Moon face, genital hemorrhage and body weight increase, which are thought to be caused by MPA, were found in both groups without a significant difference in incidence. The results of this study revealed no differences in effectiveness or safety between MPA 1,200 mg and 600 mg, suggesting that MPA for combined use with CAF is fully effective at a dose of 600 mg.