Breast cancer is a complex disease that’s different for every woman. Before you start a treatment, your doctor will want to know the size of the tumor and how far it has spread in your body, called the stage of the cancer. There are five basic stages, 0 through IV, and a number of sub-stages.
Staging is a way for doctors to describe your condition. It doesn't tell the whole story, though. Your doctor will think about many things before she recommends treatments for you, including: