Abstract
Controversy continues to exist concerning the reason for an apparently greater therapeutic effect of postoperative chemotherapy in premenopausal Stage 2 patients as compared with postmenopausal patients (Brincker et al. 1987). The two major reasons suggested for the apparent difference have been a lower dose delivery in postmenopausal patients (Bonadonna and Valagussa 1981) and a drug-induced ovarian ablation in premenopausal patients (Pouquier 1978). The dosing hypothesis is not fully supported by other trials such as that of the Eastern Cooperative Oncology Group (ECOG), wherein the results for postmenopausal patients were similar to those of the initial Milan experience (Tormey et al. 1986). Similary, the differences observed in premenopausal patients with postoperative oophorectomy did not always provide a significant effect or appear to be as great as has been observed with postoperative chemotherapy (Cole 1975; Fisher 1971; Meakin 1986). This chapter examines this controversy further and develops a hypothesis to explain the apparently greater therapeutic impact of chemotherapy among Stage 2 premenopausal patients. The hypothesis suggests a treatment approach which could be tested in future premenopausal adjuvant trials.
Supported in part by the National Cancer Institute, National Institutes of Health, USA, grant #P01-CA20432.
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Tormey, D.C. (1989). Endocrine Effects of Adjuvant Chemotherapy in Premenopausal Women: Suggestions for the Future. In: Senn, HJ., Goldhirsch, A., Gelber, R.D., Osterwalder, B. (eds) Adjuvant Therapy of Primary Breast Cancer. Recent Results in Cancer Research, vol 115. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83337-3_15
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DOI: https://doi.org/10.1007/978-3-642-83337-3_15
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