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Older women can benefit from chemotherapy to treat breast cancer

Age alone should not prohibit the use of chemotherapy regimens in older women with breast cancer who are otherwise in good general health, according to a study in the March 2 issue of JAMA.

"The incidence of breast cancer increases with increasing age, and almost half of all new breast cancers in the United States occur in women 65 years of age or older," the authors note in background information in the article. "Systemic adjuvant (secondary treatment) chemotherapy in women with early-stage breast cancer significantly improves both relapse-free and overall survival in women aged 50 to 69 years old, but data are lacking for women aged 70 years or older." The authors add that available data suggest that adjuvant chemotherapy may be significantly underused in older patients or that inappropriate dose reductions are made that decrease its effectiveness.

Hyman B. Muss, M.D., from the Vermont Cancer Center, Burlington, Vt., and investigators from the Cancer and Leukemia Group B (CALGB) analyzed data from four randomized clinical trials of treatments for lymph node-positive breast cancer cases between 1975 and 1999. These trials compared more aggressive with less aggressive chemotherapy regimens. A total of 6, 487 women with lymph node-positive breast cancer were included in the trials; 542 (8 percent) of the patients were 65 years or older and 159 (2 percent) were 70 years or older.

" smaller tumor size, fewer positive lymph nodes, more chemotherapy, and tamoxifen (drug used to treat breast cancer) use were all significantly related to longer disease-free and overall survival," the authors found in their analyses of the studies. "There was no association between age and disease-free survival. Overall survival was significantly worse or patients aged 65 or older because of death from causes other than breast cancer. Thirty-three deaths (0.5 percent of all patients) were attributed to treatment, and older women had higher treatment-relate
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Contact: Jennifer Nachbur
802-656-7875
JAMA and Archives Journals
1-Mar-2005


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