With gene mutations, second breast cancer risk rises over time

November 20, 2014 11:41 PM

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(Reuters Health) – Women who are genetically susceptible to breast cancer and develop it in one breast are at higher than average risk for a tumor in the other breast, and that risk may increase as time goes on, according to a new analysis.

Mutations in the BRCA 1 or 2 genes increase the risk for several types of cancer and account for 5 percent to 10 percent of breast cancers, according to the National Cancer Institute.

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