[Solitary oligodendroglioma of the optic nerve. Apropos of a case]

Proptosis, decreased vision and oculo-motor palsies developed in the left eye of a 14-year-old girl, without neurofibromatosis signs. Computed tomographic (CT) Scans of the head and orbit showed a large fusiform expansion of the left optic nerve without intracranial involvement. Magnetic resonance imaging improved contrast resolution over CT Scanning. A neurosurgical approach was performed and the optic nerve was resected from the back of the globe to the intracranial portion. Microscopic sections demonstrated oligodendroglioma, an unusual form of optic nerve glioma.