Dec 10, · The first thing to know is that stage 3 breast cancer means the cancer has spread beyond the tumor. It has possibly gone to lymph nodes and muscle but hasn’t spread to nearby organs. Doctors have Author: Ann Pietrangelo. Treatment of Breast Cancer Stages I-III The stage (extent) of your breast cancer is an important factor in making decisions about your treatment. Most women with breast cancer in stages I, II, or III are treated with surgery, often followed by radiation therapy. Many women also get some kind of drug therapy.
Stage 3 cancer means the breast cancer has extended to beyond the immediate region of the tumor and may have invaded nearby lymph nodes and muscles, but has not spread to distant organs. Although this stage is considered to be advanced, there are a growing number of effective treatment options.