Progressive versus Nonprogressive Intracranial Dural Arteriovenous Fistulas: Characteristics and Outcomes

Area of Science:

• Neurology
• Radiology
• Vascular Surgery

Background:

• Intracranial dural arteriovenous fistulas (dAVFs) are abnormal connections between dura mater arteries and veins.
• A small subset of dAVFs exhibit progression over time, necessitating identification of predictive factors.

Purpose of the Study:

• To identify features predicting progression in intracranial dural arteriovenous fistulas.
• To define the clinical outcomes for patients with progressive dAVFs.

Main Methods:

• Retrospective review of imaging and clinical records for patients with intracranial dAVF.
• Comparison of angioarchitectural features and clinical data between progressive and non-progressive dAVF groups.

Main Results:

• 5.9% of 579 patients had progressive dAVFs (enlarging, de novo, multiple, or recurrent).
• Children were more likely to have progressive dAVFs than adults.
• Venous sinus dilation and pseudophlebitic cortical venous patterns were associated with progressive dAVFs.
• Progressive dAVFs required more treatments but did not show worse overall outcomes, though some young patients died from complications.

Conclusions:

• Progressive intracranial dural arteriovenous fistulas are rare but can have severe consequences.
• Younger age at presentation and signs of venous hypertension may predict progression.
• Prospective identification of these features can guide management strategies.