A very common question from so many patients. And very often it is difficult to give them a definitive answer. To make sense of this situation, it is natural to seek a reason for this cancer diagnosis, something they did or didn't do. But, for most patients, my answer is simple: We really don't know what caused your breast cancer. Now for about 10% of breast cancers, there can be an inherited genetic mutation on a specific gene that led to this cancer. But what about th