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BRCA1 and BRCA2 are known as the breast cancer genes. Changes in these genes cause a higher risk of breast and other cancers. These changes can result in an 80 percent chance of developing breast cancer over a lifetime. Changes in other genes, such as p53, PTEN and CHEK2, also increase the risk of breast cancer.
Get more information on genetic risk, counseling and testing. This includes options to help prevent breast cancer for women known to be at high risk.
High-Dose Radiation Exposure
Radiation therapy (RT) is used to treat a number of conditions. RT treatment can raise the risk of breast cancer. Risk factors linked to RT include:
- Exposure to a large amount of radiation before age 30 as treatment for cancers such as lymphoma