The breast is made up of lobules (milk-producing glands), ducts (passageways that convey milk from the lobules to the nipple) and other tissues. Most breast cancers develop within the lining of the ducts or the lobules. A small percentage of tumors originate in the connective tissues or blood vessels of the breast. Breast cancer types include:
Signs and Symptoms
One symptom of breast cancer is a lump or mass that can be felt in the breast. Some women may experience pain or tenderness in the breasts. Symptoms of inflammatory breast cancer can include redness, a thickening or pitted appearance of the skin, increased firmness of the breast and inversion of the nipple.