The Different Types of Breast Cancer, Explained

Breast cancer is a type of cancer that forms in the breast tissues and is regarded as the most common type of cancer in women. Although it is one of the most studied, the causes have not been fully known, but the risk factors are identified. Some of the risk factors include obesity, lack of exercises, family history, and age. It occurs in both women and men but is far more common in women. In the United States alone, about twelve percent of women develop breast cancer in their lifetime. The first warning sign is usually a lump or thickening in the breast that differs from the surrounding tissues. Other symptoms include a change in breast shape, inverted nipple, and dimpling.