ABSTRACT
Meningiomas of the nasal cavity and paranasal sinuses can be divided into three groups: those due to direct extracranial extension from an intracranial meningioma; those due to distant metastasis from an intracranial meningioma; and primary meningioma of the nasal cavity and paranasal sinuses without any apparent association with an intracranial tumor. The incidence of meningiomas among all intracranial neoplasms is 15 to 18%. They are most commonly present in the middle age, with a peak incidence around age 45. Similar high incidence of young individuals is also observed in patients with primary intraorbital or cutaneous meningiomas. The meningotheliomatous form together with the transitional form comprises about 80% of the total pathologic spectrum of primary meningiomas of the nasal cavity and paranasal sinuses. Wolman reported 20 of 320 patients (6%) with extracranial manifestation, and 4(1%) had direct involvement of the nasal cavity and paranasal sinuses.
