Should all BRCA1 mutation carriers with stage I breast cancer receive chemotherapy?
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文摘
To estimate the 15-year survival following a diagnosis of stage I breast cancer among women who carry a BRCA1 mutation and to determine predictors of mortality, including the use of chemotherapy. Patients were 379 women with stage I breast cancer for whom a BRCA1 mutation had been identified, in herself or in a close family member. Patients were followed for up to 15?years from the initial diagnosis of breast cancer. Survival rates were estimated for women by age, tumor size (??cm; >1?cm), ER status (±), and by chemotherapy (yes/no). 42 women died of breast cancer in the follow-up period (11.2?%). Survival rates were similar for women with cancers of size 0-.0?cm and size 1.1-.0?cm. Of the 267 women in the study who used chemotherapy, 21 had died (7.9?%) compared to 21 deaths among 112 women who did not receive chemotherapy (18.8?%; p?=?0.002). The 15-year survival was 89.4?% for women who received chemotherapy and was 73.1?% for women who did not receive chemotherapy (p?=?0.08; log rank). The adjusted hazard ratio for death following a diagnosis of stage I breast cancer associated with chemotherapy was 0.53 (95?% CI 0.28-.07; p value 0.06) after adjusting for age of diagnosis, tumor size, and estrogen receptor status. This was statistically significant only among women with ER-negative breast cancers (HR?=?0.28; 95?% CI 0.10-.79; p?=?0.02). BRCA1 positive women who are treated for stage I breast cancer with chemotherapy have better survival than those who do not receive chemotherapy. The difference cannot be explained by other prognostic factors. All women with invasive breast cancer and a BRCA1 mutation should be considered to be candidates for chemotherapy.

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