She underwent genetic testing for breast cancer and learned she had a BRCA2 mutation, which increases one’s risk of developing breast and other cancers, including ovarian cancer. Jill learned she had breast cancer after receiving her genetic testing results and undergoing a breast MRI in preparation for what she thought was a preventative double mastectomy. “Genetic testing is power, not something to be scared of.”To highlight the importance of genetic screening, TODAY is gathering participants to sign up for DNA testing on Oct. 1. As director of the Dubin Breast Center of the Tisch Cancer Institute at Mount Sinai, Dr. Elisa Port noted some conditions used to determine who should undergo genetic testing to understand their breast cancer risk. For people without a clear genetic risk or who don't know their family health history, they might consider a commercial genetic test.