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Radiosurgery for vestibular schwannomas.

Chuan-Fu Huang1, Hsien-Tang Tu, Hsiu-Kuan Lo

  • 1Department of Neurosurgery, Chung Shan Medical University Hospital, Taichung, Taiwan, R.O.C. gamma@csh.org.tw

Journal of the Chinese Medical Association : JCMA
|July 26, 2005
PubMed
Summary

Gamma Knife radiosurgery effectively controls unilateral vestibular schwannomas in 95.6% of cases. This treatment offers a low complication rate, preserving hearing in most patients and avoiding major nerve dysfunction.

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Area of Science:

  • Neurosurgery
  • Radiation Oncology

Background:

  • Vestibular schwannomas, also known as acoustic neuromas, are tumors that develop on the nerve connecting the ear to the brain.
  • Microsurgery has been the traditional treatment, but radiosurgery offers an alternative approach for tumor control and complication management.

Purpose of the Study:

  • To evaluate the efficacy of Gamma Knife stereotactic radiosurgery in controlling unilateral vestibular schwannomas.
  • To assess the complication rates associated with radiosurgery for these tumors.

Main Methods:

  • A retrospective review of 45 patients with acoustic schwannomas treated with Gamma Knife stereotactic radiosurgery.
  • Median follow-up of 25 months, with analysis of tumor control, hearing preservation, and cranial nerve function.

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Main Results:

  • High tumor control rate of 95.6% was achieved.
  • Hearing preservation was maintained in 76.9% of patients with initially serviceable hearing.
  • Low incidence of delayed cranial nerve complications, with one case of trigeminal sensory loss.

Conclusions:

  • Gamma Knife radiosurgery is an effective treatment for unilateral vestibular schwannomas, demonstrating a high tumor control rate.
  • The procedure is associated with a relatively low rate of post-treatment complications, including favorable hearing outcomes.