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Updated: Dec 24, 2025
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Microvascular Decompression: Salient Surgical Principles and Technical Nuances
Published on: July 5, 2011
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Aberrant Abducent Nerve During Microvascular Decompression for Trigeminal Neuralgiass.
1Victor Horsley Department of Neurosurgery, The National Hospital for Neurology and Neurosurgery-University College London Hospitals, Queen Square, London, United Kingdom.
World Neurosurgery
|April 7, 2020
Summary
Microvascular decompression effectively treated trigeminal neuralgia. Surgeons should review imaging for unusual anatomy, like an ectatic artery compressing the abducent nerve, to ensure patient safety during MVD procedures.
Area of Science:
- Neurosurgery
- Neuroanatomy
Background:
- Microvascular decompression (MVD) is a standard surgical treatment for trigeminal neuralgia and hemifacial spasm.
- Understanding the complex anatomy of the cerebellopontine angle is critical for preventing cranial nerve injury during MVD.
Observation:
- A case involving a 76-year-old female patient with refractory trigeminal neuralgia impacting the V1 and V2 trigeminal nerve divisions.
- Intraoperative findings revealed an ectatic anterior inferior cerebellar artery causing an aberrant course of the abducent nerve.
Findings:
- Successful decompression of the trigeminal nerve was achieved, resolving the patient's facial pain.
- Abducent nerve decompression was not performed as its function was unaffected, and no new diplopia occurred post-surgery.
Implications:
- Preoperative imaging review is essential to identify and anticipate unusual anatomical variations in the cerebellopontine angle.
- This case highlights the importance of meticulous surgical planning to navigate complex neurovascular relationships during MVD.
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