Intraocular extension of optic nerve meningioma in a case of neurofibromatosis.

A case of intraocular extension of primary optic nerve meningioma occurred in a 13-year-old girl with neurofibromatosis. An anomalous disc in the involved blind eye was diagnosed as optic nerve glioma at 2 1/2 years of age. The aggressive nature of meningiomas in the young and the long time period involved account for this rare occurrence of direct intraocular extension.