About breast cancer

Breast cancer is the most common cancer in women in the United States. According to the American Cancer Society, it's estimated that 211,240 women will be diagnosed with breast cancer in the US in 2005, and 40,410 women will die from the disease.

If you're worried about developing breast cancer, or if you know someone who has been diagnosed with the disease, one way to deal with your concerns is to get as much information as possible. In this section you'll find important background information about what breast cancer is and how it develops.

• What is cancer?
• About the breast
• What is breast cancer?