What is the role of interstitial brachytherapy in the treatment of glioblastoma multiforme (GBM)?

Updated: Jul 01, 2019
  • Author: Jeffrey N Bruce, MD; Chief Editor: Herbert H Engelhard, III, MD, PhD, FACS, FAANS  more...
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Interstitial brachytherapy is of limited use and is rarely used. By implantation of radioactive seeds, a large dose of radiation is delivered to the tumor volume, with rapid fall-off of radiation in surrounding tissue. The tumor must be unilateral and smaller than 5 cm in diameter. In one study, patients treated with interstitial brachytherapy had a significantly better median survival (2 mo) compared with the conventional focal external beam radiation therapy. Following interstitial brachytherapy, up to 40% of patients require another surgery for removal of tissue damaged by radiation necrosis. [70]

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