Breast cancer was once thought to be one disease. We now know there are many different types of breast cancers and that inherited genes -- as well as environmental, lifestyle and socio-economic factors -- can conspire together to elevate your risk and produce changes in breast cells that lead to different types of breast cancer.
We also used to have a one-size-fits-all approach to treating cancer. We now know that treatments need to be individualized to your unique situation, including both your genetic makeup and your tumor's genetic profile, in order to determine the best customized treatment approach for you. Genetic testing can provide this valuable information. But with the ever growing number of tests available, which tests really matter? Read more from Dr. Weiss at Yahoo! News.