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21-Gene assay to inform chemotherapy benefit in node-positive breast cancer.


Kalinsky K, Barlow WE, Gralow JR, Meric-Bernstam F, Albain KS, Hayes DF et al.
N Engl J Med 2021; 385: 2336-2347

The study included 5083 women with hormone receptor positive, HER 2 negative breast cancer with 1-3 positive axillary nodes and a recurrence score above 25. They all received endocrine therapy, and were randomized to additional chemotherapy. Five year overall survival rates were not improved with chemotherapy: 91.3 versus 91.9 percent, but disease-free survival was better in premenopausal women.

Comment: A large and complex trial that helps inform how to mange women with node positive breast cancer.

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