Interstitial radiation therapy

Cancer 101: Cancer Explained

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.

Interstitial radiation therapy is also called seed implantation or brachytherapy (brachys being Greek for short).


Quick GuideUnderstanding Cancer: Metastasis, Stages of Cancer, and More

Understanding Cancer: Metastasis, Stages of Cancer, and More

Subscribe to MedicineNet's Cancer Report Newsletter

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Reviewed on 1/24/2017

Health Solutions From Our Sponsors