Intracranial dural A-V fistulae

Area of Science:

• Neurology
• Vascular Surgery
• Radiology

Background:

• Dural arteriovenous malformations (DAVFs) are uncommon vascular lesions affecting the dura mater and cerebral veins.
• Lesion location varies, with cavernous sinus DAVFs more prevalent in Asian populations and transverse sinus DAVFs more common in Western populations.
• Treatment options include microsurgery, endovascular embolization, and Gamma Knife radiosurgery (GKNS).

Purpose of the Study:

• To summarize the characteristics and treatment considerations for dural arteriovenous malformations (DAVFs).
• To differentiate management strategies based on the presence or absence of cerebral venous reflux (CVR).

Main Methods:

• Literature review and synthesis of existing data on DAVFs.
• Analysis of treatment outcomes based on fistula location and presence of CVR.

Main Results:

• Cerebral venous reflux (CVR) is a critical complicating factor in DAVFs, increasing risks of hemorrhage, neurological deficits, and mortality.
• Patients with CVR necessitate treatment focused on fistula occlusion.
• Patients without CVR may be managed conservatively with symptom reduction, though therapy may still be indicated based on symptom severity.

Conclusions:

• The presence or absence of CVR is a key determinant in the management strategy for DAVFs.
• Treatment aims to either occlude the fistula (in cases with CVR) or manage symptoms (in cases without CVR).
• Gamma Knife radiosurgery (GKNS) is often used in conjunction with embolization for DAVF treatment.