Risk Factors for Breast Cancer
- Prior personal history of breast cancer, or other abnormalities in the breast tissue
- Breasts that have a high proportion of lobular and ductal tissue instead of fatty tissue, which makes the breast tissue more dense
- Previous breast exposure to radiation therapy before age 30
- Pregnancy after age 30, or no pregnancy at all
- Absence of breast-feeding
- Overweight, particularly after menopause
Increased exposure to estrogen, which includes:
- First menstrual period before age 13
- Menopause after age 51
- Prolonged use of hormone replacement therapy
- Previous biopsy results that indicate atypical hyperplasia, lobular carcinoma in situ, or radial scar formation
- Drinking three or more alcoholic drinks daily
- Having a sedentary lifestyle
Breast cancer. National Cancer Institute website. Available at: http://www.cancer.gov/cancertopics/types/breast. Accessed January 9, 2014.
Breast cancer. Office on Women's Health website. Available at: http://www.womenshealth.gov/breast-cancer/index.html. Updated November 17, 2010. Accessed January 9, 2014.
National Breast and Cervical Cancer Early Detection Program. Centers for Disease Control and Prevention website. Available at: http://www.cdc.gov/cancer/nbccedp. Updated December 13, 2013. Accessed January 9, 2014.
Risk factors for breast cancer. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated October 24, 2013. Accessed January 9, 2013.
- Reviewer: Michael Woods, MD
- Review Date: 01/2014 -
- Update Date: 00/10/2014 -
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