The Role and Limitations of Gamma Knife Radiosurgery(<SPECIAL ISSUES>Stereotactic Radiosurgery Past, Present and Future)

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  • Maruyama Keisuke
    Department of Neurosurgery, Faculty of Medicine, The University of Tokyo
  • Koga Tomoyuki
    Department of Neurosurgery, Faculty of Medicine, The University of Tokyo
  • Shin Masahiro
    Department of Neurosurgery, Faculty of Medicine, The University of Tokyo
  • Saito Nobuhito
    Department of Neurosurgery, Faculty of Medicine, The University of Tokyo

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  • ガンマナイフの役割と限界(<特集>定位放射線治療の現状と展望)

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The primary role of Gamma knife radiosurgery is to control small, benign or metastatic brain tumors while pre-serving critical neuronal functions. Controlling functional disorders is another role of Gamma knife radiosurgery. It can provide high-quality radiosurgery as it is based on 40-years of treatment history and it has a high level of maneuverability. On the other hand, the limitations of Gamma knife radiosurgery include a difficulty to control large lesions or malignant tumors, a relatively slow treatment effect, a risk of radiation injury to the optic nerve, and a limit of treat-able range. Extra long-term results of more than 20 years also have to be clarified in the future.

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