Dictionary of Cancer Terms
View in Spanish: Radioterapia interna
Internal radiation therapy (in-TER-nul RAY-dee-AY-shun THAYR-uh-pee)
A type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor. Also called brachytherapy, implant radiation therapy, and radiation brachytherapy.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.