Abstract
PURPOSE: To raise the awareness of the rare complication of monocular blindness resulting from radiofrequency rhizotomy for trigeminal neuralgia. METHODS: Case series from tertiary referral centers. Patients were referred after complaint of loss of vision. RESULTS: We report three patients who had trigeminal neuralgia and underwent treatment by radiofrequency rhizotomy. Each developed complete loss of vision in one eye immediately after the procedure. One patient died of an unrelated cause, and pathologic analysis revealed changes compatible with acute trauma to the right optic nerve. CONCLUSION: Our third case confirms the hypothesis that traumatic optic neuropathy after trigeminal radiofrequency rhizotomy results from malpositioning of the rhizotomy needle through the inferior orbital fissure into the orbital apex rather than the foramen ovale.
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