PRIMARY EXTRADURAL SINONASAL MENINGIOMA WITH PROPTOSIS AS PRESENTATION : A RARE CASE REPORT WITH REVIEW OF LITERATURE

Meningiomas are one of the common brain tumours which have origin for arachnoid cap cells. Extradural meningiomas are rarer variants classified into primary and secondary in nature based on their source of origin. The common location of primary extradural meningiomas is head and neck with paranasal sinuses being a common site in head and neck. The treatment of choice lies with complete excision of tumour which usually follows a good prognosis and low rates of recurrences. Current literature is scarce about primary extradural meningiomas with majority being case reports or short case series only. We here present a case report of a primary extradural meningioma of right frontal and ethmoidal sinus treated by surgical excision. This case report adds on to the current knowledge of literature about primary extradural meningiomas.Summary A 28 year old male presented with chief complaints of right eye proptosis and right frontal headache with no neurological deficit reported to our centre with a trans nasal biopsy report of his lesion done elsewhere to be psamomatous meningioma Grade I. On reviewing his MRI Brain and paranasal sinuses, a totally extradural space occupying lesion in right frontal and ethmoidal sinuses communicating into intracranial cavity pushing right frontal lobe up and extending into roof of right orbit was found. Patient underwent right frontal craniotomy with complete excision of tumour with subsidence of proptosis in immediate post operative period. Primary extradural meningiomas are rare entities with scarce literature available. We write this case report to add on to current literature available and also briefly discuss the literature review known currently.