I a patient has breast cancer, when would you give radiation therapy?

Breast irradiation: Radiation therapy is used for localized breast cancer. Radiation alone is not a curative treatment for breast cancer. In breast cancer, it is used as an additional (adjuvant) treatment to treat local and regional areas at high husk for microscopic disease. It's use depends on stage and what type of surgery had been performed. For more information, cancer.Gov, cancer.Org, astro.Org, nccn.Org.