Cancer susceptibility genes and their potential implication regarding systemic therapy for early-stage breast cancer

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 The development of leukemia after chemotherapy and/or radiotherapy for breast cancer has been recognized for 4 decades. In this issue, Churpek et al have conducted a retrospective study that expands on a growing body of knowledge for understanding an individual's genetic risk, not only for breast cancer, but also for second cancers such as leukemia.