A 69-year-old woman presented with an 8-month history of diplopia and examination findings consistent with a right third-nerve palsy. Head MRI identified the presence of a 5.8 mm, nodular, isointense lesion in the suprasellar cistern, which demonstrated enhancement with gadolinium contrast. The lesion did not show any evidence of growth over a 3-month follow-up period. These MRI findings, alongside the clinical features, suggest oculomotor nerve schwannoma. Oculomotor schwannomas are a rare cause of third-nerve palsy. The presenting features and management options for oculomotor schwannomas are discussed to provide a framework for the diagnosis and management of these patients.
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Contributors EB: provided substantial contributions towards manuscript conception, acquisition of data and analysis and interpretation of data; drafting the article and revising it critically for important intellectual content. RV: provided substantial contributions towards manuscript design, acquisition of data and data analysis; drafting the article and revising it critically for important intellectual content. CH: provided substantial contributions towards manuscript conception; interpretation of data; drafting the article and revising it critically for important intellectual content, and final review of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Patient consent for publication Obtained.