ABSTRACT
INTRODUCTION AND IMPORTANCE: Extra cranial primary meningioma of sinonasal tract is a rare entity. It is often misdiagnosed as nasal polyp. CASE PRESENTATION: Here we report a case of a primary ethmoid sinus meningioma with extension into the nasal cavity in a 41-year-old man. The tumor was completely excised via endoscopic endonasalapproach and the histologic diagnosis of meningioma was established. The patient was regularly follow up for 12 months without recurrence of the tumor. CLINICAL DISCUSSION: The final diagnosis of primary sinonasal meningioma is based on histopathology and immunohistochemistry analyses results. The importance of complete surgical resection is undoubted and also is a goodindicator prognosis. CONCLUSION: The otolaryngologists should be aware of the diagnosis of primary meningioma; despite of its rarity it is considered as a possible cause of nasal obstruction.
