[Symptomatology of a primary intraorbital meningioma of the optic nerve].

Report on an 18-year-old man with a histologically confirmed intraorbital meningioma (transitional type) of the right optic nerve. The symptoms were slowly progressive loss of vision with central scotoma and pallor of the disk, without proptosis or disturbance of eye motility. Computer tomography performed preoperatively did not permit the differential diagnosis of glioma.