Definitions for "Internal radiation therapy"
Internal radiation therapy is one of the two types of radiation therapy. With this type, a radioactive substance is placed inside the body very close to, or right inside, the cancerous tumor, or in the place of a previously removed cancer. (See also external radiation therapy.)
The placement of small radioactive pellets, or "seeds," in the prostate to deliver the radiation dose to the cancer around the clock for weeks or months.
(also called brachytherapy): a procedure whereby radioactive material is injected into, or near a tumor to kill the cells within it