Olfactory Groove Meningioma – A Case Report

Abstract

Introduction: Olfactory groove meningiomas are rare anterior cranial fossa meningiomas, constituting 8–13% of all intracranial meningiomas.

Case Report: A 54-year-old female presented with left-sided sensorineural hearing loss, ipsilateral trigeminal nerve involvement, and impaired cerebellar function tests. She also had absent smell sensation for the previous 2–3 years, although this was not her primary complaint. MRI demonstrated a left cerebellopontine angle lesion and an incidental olfactory groove lesion suggestive of meningioma. The CP angle tumour was excised initially, while the olfactory groove meningioma was followed radiologically. Progressive enlargement of the lesion prompted endoscopic transnasal excision. The postoperative period was uneventful.

Conclusion: Complete surgical excision remains the definitive treatment for skull base meningioma. The endoscopic transnasal approach offers lower morbidity than traditional open approaches when appropriate patient selection is ensured. The case also emphasizes the importance of evaluating patients presenting with anosmia, a symptom that may otherwise be overlooked.