Top 10 Breast Cancer Risk Factors

genetics

5. Genetics

In the early 1990s, scientists discovered a genetic disposition to breast cancer in mutations of the genes BRCA1 and BRCA2 (named for BReast CAncer). For a woman with a first-degree relative who’s had breast cancer, getting tested can provide a measure of relief from anxiety, and a more informed sense of the risks for you or your children. Still, the genetic causes of breast cancer are largely a mystery. Only about 40 percent of hereditary breast cancer is linked to these two genes, and only 5 to 10 percent of breast cancers are hereditary.

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