Intracanalicular Optic Nerve Meningioma-A Case Report

Abstract

We present a 40-year-old female patient who complained of loss of vision in her left eye for two weeks. On ophthalmic examination, the best corrected visual acuity in the left eye was reduced to hand motion. The color sensation in her left eye was also impaired. Her left pupil showed mid-dilatation with signs of RAPD. Fundal examination revealed that the left disc was mildly edematous; however, its margin was not blurred and the appearance of mottled RPE was also noted in the left macula. On visual field examination, temporal hemianopsia of the left eye was noted. Subsequent orbital and brain CT scan and MRI showed a tumor involving the left optic canal, anterior clinoid process of the sphenoid and the cavernous sinus. She was then transferred to the neurosurgical department under the suspicion of an optic nerve tumor with intracranial involvement. The pathology of the specimen excised confirmed a proliferation of meningothelial cells, which is consistent with optic nerve meningioma. Postoperatively, her visual acuity in the left eye worsened to no light perception.