NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,942 terms related to cancer and medicine.
- internal radiation therapy
- listen (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.