Spinal extradural arteriovenous fistulas: clinical article

Area of Science:

• Neurosurgery
• Vascular Neurology
• Interventional Radiology

Background:

• Spinal extradural arteriovenous fistulas (eAVFs) are uncommon vascular malformations.
• Limited data exists on their demographics, natural history, and treatment outcomes.
• Understanding these rare lesions is crucial for effective patient management.

Purpose of the Study:

• To elucidate the demographics, natural history, and treatment results of spinal eAVFs.
• To analyze angioarchitectural features and outcomes associated with different treatment strategies.
• To provide a comprehensive overview of this rare condition.

Main Methods:

• A pooled analysis of PubMed database through December 2012 was performed.
• Individual patient data from 63 eligible studies (101 patients) were extracted.
• Demographic, clinical, angioarchitectural features, and treatment outcomes were analyzed.

Main Results:

• The mean patient age was 45.9 years; no significant sex predilection was observed.
• Hemorrhage occurred in only 10% of patients; none occurred during untreated follow-up.
• High complete obliteration rate (91%) and symptom improvement (89%) were achieved, with no significant difference between surgical and endovascular treatments.

Conclusions:

• Spinal eAVFs are rare with a low risk of hemorrhage, causing morbidity via mass effect or venous hypertension.
• Treatment yields high obliteration rates and significant improvement in preoperative symptoms.
• Both surgical and endovascular modalities demonstrate comparable efficacy in treating spinal eAVFs.