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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Radioterapia externa

External radiation therapy (RAY-dee-AY-shun THAYR-uh-pee)
A type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body. Also called external-beam radiation therapy.



 
 
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.