Brachytherapy

Definition of brachytherapy
National Cancer Institute

brachytherapy

(BRAY-kee-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 implant radiation therapy, internal radiation therapy, and radiation brachytherapy.

Source: NCI Dictionary of Cancer Terms