Endoscopic Management of Optic Nerve Sheath Meningocele

Optic nerve sheath dilatation forming a cyst containing cerebrospinal fliud (CSF) is a rare condition. It is actually an enlargement and dilation of primarily the optic nerve sheath. There is an expansion of the cerebrospinal fliud space around the optic nerve with no associated inflammation, orbital or cerebral neoplasm at the apex of the orbit. It is a very rare condition and only few cases have been reported in the literature. We describe a case of optic nerve meningocele which was successfully managed surgically through intranasal route. A brief review of the existing literature is also presented.