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Breast Cancer
Ashley Gay
January 18, 2012

Module F

Breast cancer is a malignant (cancerous) tumor that forms in the tissues of one or both breasts. Although breast cancer primarily affects women, it can also occur in children and men. According to the American Cancer Society (ACS), breast cancer is the second most common cancer in women and the second leading cause of cancer death in women in the United States. “ACS estimated that 261,100 new cases of breast cancer (in situ and invasive cancers) were diagnosed among women in this country in 2010. Breast cancer affects one in eight women. It can be a highly curable disease if detected and treated early. Early detection is the key to treating and curing breast cancer. Many women regularly examine their breasts to look for common warning signs. These include: * A painless lump in the breast * Abnormal thickening of the breast tissue * A change in the density of the breast
Less often, breast cancer can show up as: * A lump under the arm * Redness or scaliness of the skin on the breast * A change in the nipple (such as discharge or inversion) * Dimpling of the skin
There are several different types of breast cancers. These range from situ breast cancers (localized or noninvasive) to invasive breast cancers (infiltrating breast cancers). There are two types of situ cancers. Ductal carcinoma in situ (DCIS): a condition in which abnormal cells are confined to the milk ducts in the breast. This is the most common type of noninvasive breast cancer and can be cured by removing the tissue that contains the tumor. There is also lobular carcinoma in situ (LCIS): (also called lobular neoplasia) Cancer that begins in the lobes or lobules of the breast. This type is situ cancer is more likely than other types of breast cancer to be found in both breasts. Both types of situ cancers can become

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