Sphenoid dural arteriovenous fistulas.

Area of Science:

• Neurology
• Vascular Surgery
• Radiology

Background:

• Sphenoid wing dural arteriovenous fistulas (AVFs) are rare vascular malformations.
• These lesions can lead to serious neurological complications including hemorrhage and venous hypertension.
• Classification is based on the specific sphenoid wing involved (greater or lesser).

Purpose of the Study:

• To review the clinical behavior, diagnosis, and management of sphenoid wing dural AVFs.
• To compare the angioarchitecture and clinical outcomes of lesions involving the greater versus lesser sphenoid wings.
• To discuss current and evolving treatment modalities.

Main Methods:

• Systematic literature search of the PubMed database.
• Analysis of studies focusing on clinical presentation, imaging, and treatment outcomes.
• Review of angioarchitecture and venous drainage patterns.

Main Results:

• Greater wing sphenoid AVFs are associated with aggressive clinical courses, higher rates of cortical venous reflux, venous hypertension, and hemorrhage.
• Lesser wing sphenoid AVFs typically present with a more benign clinical course due to prominent epidural venous drainage, reducing risks.
• Embolization is increasingly the standard of care due to technological advancements.

Conclusions:

• Location of sphenoid wing dural AVFs significantly influences clinical presentation and prognosis.
• Understanding angioarchitecture is crucial for predicting disease behavior and guiding treatment.
• Endovascular embolization offers a less invasive and effective treatment option, often becoming the standard of care.