Breast cancer basically is a disease which involve abnormal cells within the breast that are growing out of control. There are several types of breast cancers which depend upon the types of cells in breast which are involved. Breast cancer usually begins in different part of the breast including the ducts, lobules & the connective tissue. While ducts are engaged in carrying milk to the nipples, lobules are glands which produce milk. Connective tissue which generally consists of fatty & fibrous tissue surrounds & engulfs the entire breast area. Breast cancers are most often found to begin from ducts or lobules region. Moreover, breast cancers are also found to spread outside breast areas through lymphatic system & blood vessels. Primary breast cancer which spreads to other areas of the body are said to have metastasized.