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Related Experiment Videos

Hemifacial spasm caused by a venule: case report.

P J Jannetta

    Neurosurgery
    |January 1, 1984
    PubMed
    Summary

    Hemifacial spasm is caused by blood vessel compression of the facial nerve root. A subtle case involving a venule was successfully treated with microvascular decompression, resolving the spasm.

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    Area of Science:

    • Neurosurgery
    • Neurology

    Background:

    • Hemifacial spasm (HFS) is a neurological disorder characterized by involuntary contractions of facial muscles.
    • It is typically caused by compression of the facial nerve root entry zone by aberrant blood vessels.

    Observation:

    • The case details a subtle vascular compression, specifically a venule, at the facial nerve root entry zone.
    • This venule ran in an anterior-posterior direction across the caudal aspect of the zone.

    Findings:

    • Microvascular decompression involving coagulation and division of the venule led to symptom resolution.
    • A small, likely non-contributory arteriole was also decompressed.
    • The patient experienced gradual improvement and remained free of hemifacial spasm and facial weakness post-operation.

    Implications:

    • This case highlights that even subtle vascular compressions, like a venule, can cause hemifacial spasm.
    • It underscores the importance of meticulous surgical exploration in microvascular decompression for HFS.
    • The findings expand the spectrum of causative vascular pathologies in hemifacial spasm.

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