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How genetic testing can predict breast cancer risk

How genetic testing can predict breast cancer risk

While most cancer happens by chance, about 5-10% of cases are hereditary. Hereditary cancers are caused by a harmful variant in a gene that runs in families and may be passed down from parents to children, causing a higher risk for cancer. For example, more than 60% of women who inherit a harmful variant in the BRCA1 or BRCA2 genes will develop breast cancer during their lifetime, compared to only about only about 13% of women in the general population.

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