Abstract

We report a case of isolated oculomotor nerve paresis due to sphenoiditis. A 33-year-old woman reporting mild left-side ptosis and diplopia had no signs of brain aneurysm or diabetes mellitus. Despite her left-side ocular movement disturbance and ptosis, ophthalmological examination showed neither visual impairment nor pupil dilation. Symptoms were due to isolated left-side oculomotor nerve paresis. Computed tomography (CT) showed soft tissue density in the sphenoid sinus, fielding a definitive diagnosis of sphenoiditis necessitating endoscopic surgery under general anesthesia. All symptoms disappeared within 2 months postoperatively.

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