Dictionary of Cancer Terms
View in Spanish: Radioterapia intersticial
Interstitial radiation therapy (IN-ter-STIH-shul RAY-dee-AY-shun THAYR-uh-pee)
A type of internal radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into a tumor or body tissue.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.