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NCI Dictionary of Cancer Terms


systemic radiation therapy  listen  (sis-TEH-mik RAY-dee-AY-shun THAYR-uh-pee)

  A type of radiation therapy in which a radioactive substance, such as radioactive iodine or a radioactively labeled monoclonal antibody, is swallowed or injected into the body and travels through the blood, locating and killing tumor cells.