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Home > Patient & Family Resources > Health Library > Breast cancer risk
Most women have an average risk of breast cancer. About 12 out of 100 women will get breast cancer sometime during their lives.
[Chart based on National Cancer Institute (2013). SEER Stat Fact Sheets: Breast from SEER Cancer Statistics Review, 1975–2010. http://seer.cancer.gov/statfacts/html/breast.html.]
If one woman in your family—such as a mother, a sister, or a daughter—has had breast cancer, your risk of getting it is a little higher than for women who don't have a family history of the disease. About 24 out of 100 women with one relative who has had breast cancer will get this cancer sometime during their lives.
[Chart based on American Cancer Society (2013). Breast cancer: Early detection. http://www.cancer.org/cancer/breastcancer/moreinformation/breastcancerearlydetection/index.]
If two relatives have had breast cancer, your risk for getting it goes up. About 36 out of 100 women with two relatives who have had breast cancer will get this cancer sometime during their lives.
Some women have BRCA1 gene changes. Their risk of getting breast cancer is much higher than average. For these women, about 55 to 65 out of 100 women will get breast cancer by age 70.
[Chart based on National Cancer Institute (2016). BRCA1 and BRCA2: Cancer risk and genetic testing. National Cancer Institute. http://www.cancer.gov/about-cancer/causes-prevention/genetics/brca-fact-sheet. Accessed April 6, 2016.]
Some women have BRCA2 gene changes. Their risk of getting breast cancer is much higher than average. For these women, about 45 out of 100 women will get breast cancer by age 70.
Current as of: December 19, 2018
Author: Healthwise StaffSarah Marshall MD - Family MedicineKathleen Romito MD - Family MedicineWendy Y. Chen MD, MPH MD, MPH - Medical Oncology, Hematology
Current as of:
December 19, 2018
Medical Review:Sarah Marshall MD - Family Medicine & Kathleen Romito MD - Family Medicine & Wendy Y. Chen MD, MPH MD, MPH - Medical Oncology, Hematology
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