There are two main types of radiation:
- External Radiation
- External radiation is the most common type of radiation, typically given after lumpectomy and sometimes, mastectomy. In this section, you can read about how external radiation is given.
- Internal Radiation
- Internal radiation is a less common method of giving radiation. It is being studied for use after lumpectomy. In this section, you can read about how radiation is delivered inside the breast.
Breastcancer.org's mission is to help women and their loved ones make sense of the complex medical and personal information about breast health and breast cancer, so they can make the best decisions for their lives. Medical information on the Breastcancer.org web site and in our printed materials is reviewed by members of our Professional Advisory Board, which includes over 60 practicing medical professionals from around the world who are leaders in their fields. We are a nonprofit organization supported by individuals, foundations, and corporations. Find more about us here.


