Treatment for breast cancer : Surgery to remove the whole breast called a mastectomy or to remove just the tumor and tissues around it called a lumpectomy or breast conserving surgery. Perhaps the most familiar example of hormonal therapy in oncology is the use of the selective estrogen-response modulator TAMOXIFEN for the treatment for breast cancer although another class of hormonal agents ,aromatase inhibitors, now have an expanding role in treating breast cancer. As a form of molecular medicine, targeted therapy blocks the growth of cancer cells by interfering with specific targeted molecules needed for carcinogenesis and tumor growth rather than by simply interfering with all rapidly dividing cells. Radiation therapy is an effective way to reduce your risk of breast cancer recurring surgery. It is commonly used to ease the symptoms caused by cancer that has spread to other parts of the body. Chemotherapy for breast cancer uses drugs to target and destroy breast cancer cells .These drugs are usually given directly into a vein through a needle or as a pill.