Medical Definition of Interstitial radiation therapy
Interstitial radiation therapy: Radiation treatment given by placing radioactive material directly into the target, often a tumor.
For example, in treating prostate cancer, radioactive seeds are implanted in the prostate gland. The seeds might be titanium-encased pellets containing the radioisotope iodine-125.
Quick GuideUnderstanding Cancer: Metastasis, Stages of Cancer, and More
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