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The findings are a step forward in determining ways to prevent this complication in breast cancer survivors. While the breast cancer treatments target malignant cells, they can also affect healthy cells and could increase the risk of leukemia later, the researchers said.
"The findings justify a long-term, follow-up study of women with and without inherited breast cancer gene mutations who are treated with similar therapy for breast cancer," said study leader Dr. Jane Churpek, from the University of Chicago.
"This would enable us to understand how these genes impact therapy-related leukemia risk, and whether specific treatments come with higher risks based on a woman's inherited genetics," Churpek said in a journal news release.
It can be difficult to determine whether leukemia in breast cancer survivors is or is not treatment-related, Dr. Judith Karp and Dr. Antonio Wolff, from Johns Hopkins University School of Medicine in Baltimore, noted in an accompanying journal editorial.
"Existing familial cancer registries that are prospectively following breast cancer patients and their families are uniquely positioned to ascertain the true frequency of subsequent leukemias and their associations with the therapies received," they wrote.
-- Robert Preidt
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