The genetics of breast cancer



Predictive genetic testing for breast cancer risk is under way. Women who have had more menstrual cycles because they went through menopause later after age 55 have a slightly higher risk of breast cancer. Women with dense breasts on mammogram have a risk of breast cancer that is about 1. Someone is said to have dense breasts on a mammogram when they have more glandular and fibrous tissue and less fatty tissue. Although this risk is low overall, it's even higher for younger women with breast cancer.



The genetics of breast cancer
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Breast Cancer Risk Factors You Cannot Change

Women who have had more menstrual cycles because they started menstruating early especially before age 12 have a slightly higher risk of breast cancer. African-American women are also more likely to die from breast cancer at any age. The increase in risk may be because they have a longer lifetime exposure to the hormones estrogen and progesterone. To learn more, see our information about DES exposure.

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The genetics of breast cancer
The genetics of breast cancer
The genetics of breast cancer
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Radiation treatment after age 40 does not seem to increase breast cancer risk. The increase in risk may be because they have a longer lifetime exposure to the hormones the genetics of breast cancer and progesterone. A risk factor is anything that affects your chance of getting a disease, such as breast cancer. Some risk factors for breast cancer are things you cannot change, such as being a woman, getting older, and having certain gene changes. If a woman also has a family history of breast cancer and either hyperplasia or atypical hyperplasia, she has an even higher risk of breast cancer.

The genetics of breast cancer
The genetics of breast cancer
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The genetics of breast cancer

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