interstitial radiation therapy
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in·ter·sti·ti·al ra·di·a·tion ther·a·py(in'tĕr-stish'ăl rā'dē-ā'shŭn)
Use of sealed radioactive sources in the form of needles, wires, or seeds inserted directly into malignant tissue; may be temporary or permanent.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012