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Linear accelerator radiosurgery for arteriovenous malformations.

W A Friedman1, F J Bova

  • 1Department of Neurosurgery, University of Florida, Gainesville.

Journal of Neurosurgery
|December 1, 1992
PubMed
Summary
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Radiosurgery effectively treats arteriovenous malformations (AVMs), with an 81% thrombosis rate by two years post-treatment. This treatment shows promise for AVMs, despite a small risk of complications.

Area of Science:

  • Neurosurgery
  • Radiation Oncology
  • Radiosurgery

Background:

  • Arteriovenous malformations (AVMs) pose significant neurological risks.
  • Radiosurgery offers a minimally invasive treatment option for AVMs.

Purpose of the Study:

  • To evaluate the efficacy and safety of radiosurgery for treating brain arteriovenous malformations.
  • To assess the long-term outcomes, including thrombosis rates and complications, following radiosurgical intervention for AVMs.

Main Methods:

  • Retrospective analysis of 80 patients with AVMs treated between May 1988 and August 1991.
  • Mean peripheral dose of 1650 cGy delivered to the AVM periphery (80% isodose line).
  • Angiographic follow-up at 1 and 2 years post-treatment to assess complete thrombosis.

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Main Results:

  • Overall complete thrombosis rate of 39% at 1 year, higher in smaller AVMs.
  • Overall complete thrombosis rate increased to 81% at 2 years, irrespective of initial lesion size.
  • Low complication rates: 2.5% hemorrhage and 2.5% permanent neurological deficits.

Conclusions:

  • Radiosurgery is an effective treatment for arteriovenous malformations, achieving high obliteration rates by two years.
  • The treatment demonstrates a favorable safety profile with minimal risk of severe complications.
  • Lesion size did not significantly impact the likelihood of thrombosis at the 2-year follow-up.