الفهرس 
Recent use of birth control pillsOnly 14 pages are availabe for public view
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Abstract
Cancer is a group of diseases that cause cells in the body to change and grow out of control. Most types of cancer cells eventually form a lump or mass called a tumor and are named after the part of the body -#119;-#104;-#101;-#114;-#101; the tumor originates ( Ruddon, 1995). br Breast cancer begins in breast tissue, which is made up of glands for milk production, called lobules and the ducts that connect lobules to the nipple. The remainder of the breast is made up of fatty, connective, and lymphatic tissue ( Wiley and Sons, 2001). Some breast cancers are called in situ because they are confined within the ducts (Ductal carcinoma in situ) or lobules (lobular carcinoma in situ) of the breast. Most cancerous breast tumors are invasive, or infiltrating. These cancers start in the lobules or ducts of the breast but have broken through the duct or glandular walls to invade the surrounding tissue of the breast (Weigelt et al., 2010).