Breast Cancer: Everything You Should Know to Keep It out of Your Future
Breast cancer is the second leading cause of cancer death in women after lung cancer. Learn about breast cancer causes, symptoms, and treatments; plus, steps you can take to prevent it.
What is breast cancer?
Breast cancer happens when cells in the breast begin to grow uncontrollably. Just like with other cancers, breast cancer is the result of mutations or abnormal changes in the genes responsible for regulating healthy cell growth. Normally, cells regulate themselves: they grow and divide as your body needs them. When cancer develops, however, this orderly process breaks down—abnormal, old, or damaged cells survive when they should die, and new cells form when they shouldn’t. These extra cells can divide without stopping and may form growths called tumors.