Health Information

Genetics and Breast Cancer

  • 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

  • Breast Cancer—Understanding Genetic Testing
  • Peutz-Jeghers Syndrome

    People with this syndrome have dark moles around the mouth, nose, and eyes, as well as multiple polyps in the intestines.

  • Li-Fraumeni Syndrome

    Li-Fraumeni syndrome raises the risk for breast cancer and many other types of cancer.

  • 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

  • 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.

  • About Breast Cancer in Men

    Breast cancer in men is rare—less than 1 percent of all breast carcinomas occur in men.

  • 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.