[Intranasal meningoencephalocele. A case report].

Intranasal meningoencephaloceles are rare. The tumor's appearance may suggest the diagnosis of a nasal polyp or glioma. This may lead to an inappropriate surgical approach and serious neurological complications. We report the case of an intranasal meningoencephalocele initially treated as a nasal polyp and complicated by nasal leakage of cerebrospinal fluid. The differential diagnosis of the tumor using CT and MRI and surgical treatment are described.