Breast Cancer can be defined as a malignant tumor that has developed from cells in the breast. Sometimes breast cancer either begins in the cells of the lobules, which are the milk-producing glands, or the ducts, the passages that drain milk from the lobules to the nipple. It can also begin in the fatty and fibrous connective tissues of the breast. Eventually cancer cells can invade nearby healthy breast tissue and make their way into the underarm lymph nodes, small organs that filter out foreign substances in the body. When cancer cells get into the lymph nodes, then they can enter into other parts of the body.
The type of breast cancer treatment depends upon the stage and type of the tumor. Stages can be defined on a scale of 0 through IV — with stage 0 describing non-invasive cancers that remain within their original location and stage IV describing invasive cancers that have spread outside the breast to other parts of the body. Your doctor can advice the treatment and its prognosis on the basis of the cancer stage. People should stay as healthy as possible by eating a balanced diet, maintaining a healthy weight, not smoking, limited intake of the alcohol, and regular exercise.