Macrovascular Decompression for Hemifacial Spasm: Three-Dimensional Operative Video.

Area of Science:

• Neurosurgery
• Vascular Neurology

Background:

• Symptomatic cranial nerve compression, often caused by dolichoectatic vertebrobasilar arteries, affects 1-2% of patients.
• Traditional microvascular decompression using polytetrafluoroethylene (Teflon) pledgets can fail in cases of macrovascular compression by large, tortuous arteries, risking persistent facial nerve deficits.
• This study addresses the limitations of standard techniques for managing complex arterial compression of cranial nerves.

Discussion:

• A GORE-TEX sling technique was employed to transpose a dolichoectatic vertebral artery, decompressing the facial nerve root entry zone.
• The sling was secured to a dural cuff using aneurysm clips, providing a stable and effective transposition.
• While the arterial compression was resolved, a pontine vein required a Teflon pledget for residual decompression, highlighting a combined approach.

Key Insights:

• The GORE-TEX sling transposition effectively resolved hemifacial spasm caused by vertebrobasilar artery compression.
• This technique provides a lasting solution for macrovascular compression where pledget-based methods have failed.
• Successful long-term follow-up (>2 years) demonstrates the durability and efficacy of the GORE-TEX sling method.

Outlook:

• The GORE-TEX sling offers a promising alternative for complex cases of cranial nerve vascular compression.
• Further studies could explore variations of this technique for different vascular pathologies and nerve compressions.
• This method enhances the neurosurgical armamentarium for treating debilitating neurological symptoms due to vascular anomalies.