Primary sinonasal meningioma in a child.

Meningiomas are common intracranial extra-axial masses. They are rarely encountered in extracranial locations; when they are, the most common head and neck locations are the paranasal sinuses and the temporal bone. Meningiomas in children are very rare, especially in the neonatal period. The clinical presentation and clinical findings are often nonspecific. The diagnosis can be established by imaging and histopathologic examination with immunohistochemistry. We describe a case of primary sinonasal meningioma in a 2-year-old boy whose onset of symptoms had begun during the neonatal period. We discuss the clinical features, imaging results, and histopathologic and immunohistochemical findings in this case.