Abstract
Five patients, all females, had meningiomas of the optic nerve sheath. The tumor was located in the right in four and in the left in one. Three had severe visual disturbance. All had proptosis of more than 3 mm. Three had disc edema and one had optic atrophy. Opticociliary veins were observed in only one case. Ocular movement was mildly impaired in two patients. Plain films were normal in all patients. Arteriographic abnormalities were present within the orbit in all of the four cases examined, an actual tumor blush occurring in three. Orbital venography showed evidence of the lesion within the muscle cone in 4/4. Computed tomography showed enlargement of the optic nerve in 3/3. All five cases were operated. The surgical approach for the tumors was the combined frontal intra- and extradural approach. All of the meningiomas in this series were of the meningothelial type.
