Breast cancer is the most common type of cancer among women in the United States. 8 out of 10 breast lumps are not cancerous. When breast cancer is found and treated early, a woman has more treatment choices and a chance of complete recovery. The breast, like all parts of the body, is made of cells. A cell is the smallest building block of the body.
Healthy cells grow and divide in an orderly way.
This normal growing and dividing of cells is a life-long, continuous process. It is this process that causes us to grow, to replace worn out body tissues and to have bodily injuries heal. Sometimes, cells grow and divide when they are not needed. Many unhealthy cells form too much tissue. This mass of tissue is called a tumor.