Breast cancer is classified from stage 0 (zero) to stage IV (four). The stages are determined by a sample of breast tissue, as well as examination of tissue from the lymph nodes under your arm. The purpose of staging is to estimate the chances of survival of at least five years after diagnosis. Learn about breast cancer staging with this slide show from the Mayo Clinic.
The anatomy of the human female breast contains various tissues and structures. One of the primary functions of the breast is milk production. Learn about breast ducts, muscles, and blood vessels in this slide show from the Mayo Clinic.