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Olfactory Groove Meningioma: Clinical Presentation and Surgical Outcomes of Subfrontal Approach, Experience of The National Institute of Neurology of Tunisia

Mejbri M, Karmani N, Ayadi K, Slimene A, Abderrahmen K, Kallel J

Objective: To review the clinical presentation, imaging findings, and surgical management of olfactory groove meningiomas (OGM) in a series of 25 patients. Methods: During the period between January 2010 and December 2016, 25 patients were treated for OGM in the neurosurgery department of the National Neurology Institute of Tunisia. All patients were operated via a sub-frontal approach. The mean follow-up period was 3 years. Results: The mean age was 49 years. The major clinical symptoms were olfactory disorders (60%), headaches (56%), seizures (32%), visual impairment (28%), and psychiatric disorders (20%). The mean tumor size was 57mm. Tumor removal was complete (Simpson grades I and II) in 68% of cases. Mean postoperative complications were meningitis (16%), rhinoliquorrhea (8%), and cerebral abscess (8%). Recurrence occurred in 2 patients. The mortality rate was 8%.