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Complications from arteriovenous malformation radiosurgery: multivariate analysis and risk modeling
J C Flickinger1, D Kondziolka, B E Pollock
1Department of Radiation Oncology, University of Pittsburgh School of Medicine, PA, USA.
Summary
Radiosurgery for arteriovenous malformations (AVM) complications can be predicted. The 12 Gy volume and AVM location are key factors in developing symptomatic changes after treatment.
Area of Science:
- Neurosurgery
- Radiation Oncology
- Radiology
Background:
- Arteriovenous malformations (AVMs) are complex vascular lesions.
- Radiosurgery is a treatment option for AVMs.
- Understanding complications is crucial for patient management.
Purpose of the Study:
- To identify predictors of complications after AVM radiosurgery.
- To assess the relationship between treatment parameters and adverse events.
Main Methods:
- Retrospective analysis of 307 AVM patients treated with gamma knife radiosurgery.
- Evaluation of clinical and imaging follow-up data for a minimum of 2 years.
- Multivariate logistic regression to identify significant predictors of complications.
Main Results:
- Post-radiosurgical imaging (PRI) changes occurred in 30.5% of patients, with 10.7% experiencing symptomatic changes at 7 years.
- The 12 Gy volume was the sole independent predictor of PRI changes (p < 0.0001).
- Symptomatic PRI changes were associated with both 12 Gy volume (p = 0.0013) and AVM location (p = 0.0066).
Conclusions:
- Complications from AVM radiosurgery are predictable.
- A statistical model incorporating 12 Gy volume and AVM location can estimate the risk of symptomatic changes.
- This model aids in patient selection and treatment planning for AVM radiosurgery.