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Who is at a greater risk for breast cancer?

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A woman whose mother, sister, or daughter has had breast cancer is two to three times more likely to develop the disease, particularly if more than one first-degree relative has been affected. Researchers have identified two genes responsible for some instances of familial breast cancer. These genes are known as BRCA1 and BRCA2. About one woman in 200 carries the genes. Having one of them predisposes women to breast cancer but does not ensure that they will get it.

SOURCES: 

Breastcancer.org. 

WebMD Medical Reference from the American College of Physicians: "Oncology: Breast Cancer." 

National Cancer Institute. 

Reviewed by Louise Chang on February 02, 2019

SOURCES: 

Breastcancer.org. 

WebMD Medical Reference from the American College of Physicians: "Oncology: Breast Cancer." 

National Cancer Institute. 

Reviewed by Louise Chang on February 02, 2019

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Who is most likely to get breast cancer?

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