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[Radiosurgery for large cerebral arteriovenous malformations].
F Nataf1, L Merienne, M Schlienger
1Service de Neurochirurgie, Centre Hospitalier Sainte-Anne, 1, rue Cabanis, 75674 Paris Cedex 14.
Neuro-Chirurgie
|June 16, 2001
Summary
Radiosurgery offers limited obliteration for large cerebral arteriovenous malformations. New strategies like fractionated irradiation and proton radiosurgery may improve outcomes for these challenging vascular conditions.
Area of Science:
- Neurology
- Neurosurgery
- Radiation Oncology
Background:
- Large cerebral arteriovenous malformations (AVMs) present significant treatment challenges.
- Embolization, surgery, and radiosurgery (RS) have limitations in managing these complex lesions.
Purpose of the Study:
- To review the outcomes of radiosurgery for large cerebral AVMs.
- To explore novel methods for enhancing radiosurgery efficacy in these cases.
Main Methods:
- Retrospective analysis of 112 patients with large cerebral AVMs treated with radiosurgery.
- AVMs defined as >30 mm or 10 cc; Spetzler & Martin grades III and IV predominated.
- Previous treatments included embolization (57%) and surgery (5%).
Main Results:
- The overall obliteration rate for large cerebral AVMs was 39%.
- Factors correlated with obliteration included recovery (positive) and prior embolization (negative).
Conclusions:
- Current radiosurgery techniques achieve limited obliteration rates for large cerebral AVMs.
- Future strategies such as fractionated irradiation, advanced collimator technology, and proton therapy show promise for improved outcomes.