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Aminoglutethimide for the treatment of advanced postmenopausal breast cancer.

Two hundred and thirteen unselected postmenopausal women with advanced breast cancer were treated with aminoglutethimide and hydrocortisone. There were 6 complete responses (CR), 47 partial responses (PR), 25 stable disease (SD) and 3 mixed response. Overall objective response rate was 28%, and with SD 41%. Median duration of objective response was 14 months. Years after menopause, age and tumour-free interval did not affect response rates. Main side-effects were drowsiness and lethargy (33%), rash (23%) and nausea (15%). Eleven patients (5%) stopped treatment because of toxicity. Median survival from start of treatment was 28 months and was the same for CRs, PRs and SD, compared with 10 months for progressive disease (P less than 0.001). Median survival from first metastasis was 43 months for PR/CR, 40 months for SD (not significantly different) and 22 months for progressive disease (P less than 0.001). Aminoglutethimide is an effective endocrine therapy in advanced postmenopausal breast cancer, particularly for bone deposits. Disease stabilization is associated with symptomatic and survival benefit similar to CR/PR.