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Related Experiment Video

Updated: Jun 2, 2026

Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations
14:58

Comprehensive Endovascular and Open Surgical Management of Cerebral Arteriovenous Malformations

Published on: October 20, 2017

Linac-based stereotactic radiosurgery for brain arteriovenous malformations.

S Blamek1, R Tarnawski, L Miszczyk

  • 1Department of Radiotherapy, Maria Skłodowska-Curie Memorial Cancer Center and Institute of Oncology, Gliwice, Poland. blamek@gmail.com

Clinical Oncology (Royal College of Radiologists (Great Britain))
|April 20, 2011
PubMed
Summary

Linac-based stereotactic radiosurgery for cerebral arteriovenous malformations (AVMs) shows a 40% obliteration rate after 3 years. Small, low-grade AVMs with low AVM scores benefit most from this treatment.

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Area of Science:

  • Neurosurgery
  • Radiation Oncology
  • Radiosurgery

Background:

  • Gamma knife radiosurgery is common for cerebral arteriovenous malformations (AVMs), but linac-based radiosurgery is gaining popularity.
  • The efficacy of combined endovascular and radiosurgical treatment for AVMs remains uncertain.

Purpose of the Study:

  • Evaluate obliteration and rebleeding rates after linac-based stereotactic radiosurgery for cerebral AVMs.
  • Identify factors influencing obliteration and adverse effects.

Main Methods:

  • Analysis of 62 consecutive patients with cerebral AVMs treated with linac-based radiosurgery.
  • Inclusion of patients with prior embolisation or surgery.
  • Kaplan-Meier survival and life table analyses for obliteration and bleeding rates.

Main Results:

  • Actuarial obliteration rates were 17% (1 year), 36% (2 years), and 40% (3 years).
  • Prior embolisation did not impact obliteration rates.
  • Significant factors for obliteration included Spetzler-Martin grade, AVM score, radiation dose, volume, and nidus size (<3cm).
  • Doses <15Gy reduced obliteration probability; bleeding risk decreased over time.

Conclusions:

  • A minimum 3-year follow-up is necessary for accurate outcome assessment.
  • Optimal outcomes are observed in small (<3cm), low-grade AVMs with low AVM scores.
  • Stereotactic radiosurgery leads to a gradually decreasing bleeding risk post-treatment.