Cerebral arteriovenous malformations in children

Area of Science:

• Neurosurgery
• Pediatric Neurology
• Vascular Malformations

Background:

• Cerebral arteriovenous malformations (AVMs) are congenital vascular anomalies with a higher risk of bleeding and worse natural history in children compared to adults.
• Intracranial hemorrhage is the primary presentation in 75-80% of pediatric cases, leading to significant morbidity and mortality.
• Surgical excision is the gold standard for pediatric cerebral AVMs, with complete removal rates of 70-90%.

Purpose of the Study:

• To review the experience with pediatric cerebral AVMs treated at a single institution.
• To evaluate the effectiveness of surgical excision, endovascular embolization, and stereotactic radiosurgery in managing pediatric cerebral AVMs.
• To identify predictive factors for patient outcomes in pediatric cerebral AVM management.

Main Methods:

• Retrospective review of 37 pediatric cerebral AVM cases treated between 1980 and 1997.
• Analysis of treatment modalities including surgery, endovascular embolization, and stereotactic radiosurgery, both as primary and adjuvant therapies.
• Correlation of patient outcomes with AVM characteristics, Spetzler-Martin grade, bleeding status, and neurological condition upon admission.

Main Results:

• Surgical excision was the primary treatment for 23 patients, with embolization combined in four cases.
• Radiosurgery was used as a primary or adjuvant treatment in six patients.
• Factors more predictive of outcome than AVM complexity were the occurrence of bleeding and the neurological status at admission.

Conclusions:

• Endovascular embolization and radiosurgery are effective adjuvant techniques in managing pediatric cerebral AVMs.
• Bleeding and neurological status on admission are critical predictors of outcome in pediatric cerebral AVM patients.
• Despite limitations due to small subset sizes, the study supports the role of multimodal treatment strategies for pediatric cerebral AVMs.