On Extracranial Meningioma: Case of Primary Meningioma Of Nasal Cavity

Abstract

A case of primary extracranial, ectopic meningioma of the right nasal cavity in a 40-year-old woman is described. There were no clinical or roentgenological signs of intracranial origin. The tumour had probably arisen from ectopic arachnoidal cells in the posterior upper part of the nasal cavity. Published cases are exemplified and a systematic classification of extracranial meningiomas is suggested. Apart from intraorbital meningiomas, extracranial and particularly primary extracranial or ectopic meningiomas are extremely rare. It was therefore thought legitimate to report the following case of probably primary ectopic meningioma situated in the nasal cavity and not demonstrably related to any intracranial lesion.