![](https://webarchive.library.unt.edu/eot2008/20090514065404im_/http://www.cancer.gov/images/spacer.gif) |
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(sis-TEH-mik RAY-dee-AY-shun THAYR-uh-pee)
![](https://webarchive.library.unt.edu/eot2008/20090514065404im_/http://www.cancer.gov/images/spacer.gif)
| A type of radiation therapy in which a radioactive substance, such radioactive idoine or a radioactively labeled monoclonal antibody, is swallowed or injected into the body and travels through the blood, locating and killing tumor cells. |
Previous Definitions: | systemic chemotherapy, systemic disease, systemic inflammatory response syndrome, systemic lupus erythematosus, systemic mastocytosis | Next Definitions: | systemic scleroderma, systemic sclerosis, systemic therapy, T cell, T lymphocyte |
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