Genetics and Breast Cancer

About Breast Cancer in Men
Breast cancer in men is rare—less than 1 percent of all breast carcinomas occur in men.
Ataxia Telangiectasia (A-T)
The risk for breast cancer may be increased for women who carry the A-T gene. Ataxia telangiectasia is a rare childhood disease that affects the nervous system and other body systems.
Breast Cancer—Understanding Genetic Testing
Genetics of Breast Cancer
Detailed information on the genetics of breast cancer, including information on hereditary breast ovarian cancer syndrome, brca1, brca2, Peutz-Jeghers syndrome, Li-Fraumeni syndrome, Cowden syndrome, and ataxia telangiectasia
Hereditary Breast Ovarian Cancer Syndrome (BRCA1/BRCA2)
A woman with this syndrome may develop breast cancer before age 50 and is at higher risk for developing cancer in both breasts or in both the breasts and ovaries.
Li-Fraumeni Syndrome
Li-Fraumeni syndrome raises the risk for breast cancer and many other types of cancer.
Peutz-Jeghers Syndrome
People with this syndrome have dark moles around the mouth, nose, and eyes, as well as multiple polyps in the intestines.
Topic Index - Breast Health
Detailed information on breast health, anatomy of the breast, breast development, breast cancer prevention, common breast conditions, and breast cancer in males and females