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Breast Cancer Resource
Risk Factors: Genetic

Risk Factors: Genetic

About 5% to 10% of breast cancers are thought to be hereditary, caused by abnormal genes passed from parent to child.

If you’ve had one first-degree female relative (sister, mother, daughter) diagnosed with breast cancer, your risk is doubled. If two first-degree relatives have been diagnosed, your risk is 5 times higher than average.

Women with a father or brother who has had breast cancer also have a higher risk of breast cancer.

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