Breast Cancer - Causes, Symptoms And Treatment
Breast cancer is a malignant (cancerous) growth that begins in the tissues of the breast. Over the course of a lifetime, one in eight women will be diagnosed with breast cancer. Breast cancer is a cancer of the breast tissue, which can occur in both women and men. Breast cancer may be one of the oldest known forms of cancer tumors in humans.Worldwide, breast cancer is the fifth most common cause of cancer death (after lung cancer, stomach cancer, liver cancer, and colon cancer). Breast cancer kills more women in the United States than any cancer except lung cancer. Today, breast cancer, like other forms of cancer, is considered to be a result of damage to DNA. How this mechanism may occur comes from several known or hypothesized factors (such as exposure to ionizing radiation, or viral mutagenesis). Some factors lead to an increased rate of mutation (exposure to estrogens) and decreased repair (the BRCA1, BRCA2 and p53) genes. Alcohol generally appears to increase the risk of breast cancer.
