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Microvascular decompression for superior oblique myokymia: case report
M Delour Fam1, Chris Scott, Alan Forster
1Department of Neurosurgery, Ninewells Hospital Dundee , Dundee , UK.
British Journal of Neurosurgery
|January 8, 2014
Summary
Superior oblique myokymia (SOM) is a rare eye condition causing double vision. Microvascular decompression of the trochlear nerve offers a definitive surgical solution for medication-refractory cases.
Area of Science:
- Ophthalmology
- Neuroscience
Background:
- Superior oblique myokymia (SOM) is a rare disorder characterized by episodic uniocular torsional eye movements, diplopia, and oscillopsia.
- The exact etiology of SOM is unclear, though erratic trochlear nerve discharge is implicated, with rare associations to space-occupying lesions or dural AV fistulae.
- The neurovascular compression theory, proposed in the 1980s, remains under-explored in the pathogenesis of SOM.
Observation:
- A case of severe, medication-refractory SOM is presented.
- The patient underwent successful microvascular decompression of the trochlear nerve.
Findings:
- Microvascular decompression led to the resolution of severe medication-refractory superior oblique myokymia.
- Sustained clinical response was observed over an 18-month follow-up period.
Implications:
- Microvascular decompression represents a potentially definitive and minimally invasive surgical treatment for refractory SOM.
- This approach may offer a valuable alternative to less destructive surgical options for patients with superior oblique myokymia.
