What is breast cancer?
Sometimes breast cells become abnormal. These abnormal cells grow, divide, and create new cells that the body does not need and that do not function normally. The extra cells form a mass called a tumor. Some tumors are "benign" or not cancer. These tumors usually stay in one spot in the breast and do not cause big health problems. Other tumors are "malignant" and are cancer. Breast cancer often starts out too small to be felt. As it grows, it can spread throughout the breast or to other parts of the body. This causes serious health problems and can cause death. What are the symptoms of breast cancer? Different people have different warning signs for breast cancer. Some people do not have any signs or symptoms at all. A person may find out they have breast cancer after a routine mammogram. Some warning signs of breast cancer are: new lump in or near the breast or under the arm thickening or swelling of part of the breast irritation or dimpling of breast skin redn