Woman receiving mammogram

A woman getting a mammogram. Women who have harmful mutations of the BRCA 1 and BRCA 2 genes are diagnosed with breast cancer several years earlier than their older relatives with the disease were.

( Rhoda Baer / National Cancer Institute )

A woman getting a mammogram. Women who have harmful mutations of the BRCA 1 and BRCA 2 genes are diagnosed with breast cancer several years earlier than their older relatives with the disease were.

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