Internal radiation therapy

Definition of internal radiation therapy

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: NCI Dictionary of Cancer Terms