Doctor, what caused my breast cancer? Watch Dr. Jay Harness of St. Joseph Hospital Comprehensive Breast Center in Orange, CA and the President for the American Society of Breast Surgeons explain.

Dr. Jay Harness: What caused your breast cancer is some aberrance or some change in the normal growth mechanism that goes on at the cell level. Something goes wrong which controls the growth of cells but more importantly something goes wrong that has the cancer cells or the abnormal cells not dying. It is a loss of normal control mechanisms of how cells grow, how cells die, where there is a loss of a check in balance.

Now, what happens to cause those molecular changes. In the vast majority of cancers it is not known at this time. It will be known in the future. One of the terms for cancer cells is immortal cells. By that we mean that the cells can grow unencumbered unchecked by the normal balances that we have in the growth of cells throughout our body.