title: Cysts of the optic nerve three cases associated with meningioma.
abstract: Cystic enlargement of the optic nerve sheath is extremely rare. Two cases secondary to a small meningioma in the orbital apex and one secondary to an intraorbital optic nerve sheath meningioma are described, a previously unreported association. High resolution CT scans or MRI can delineate quite small lesions in the orbital apex but a small meningioma within the dural sheath may be missed. Patients with an optic nerve cyst without an apparent cause should therefore be scanned over a number of years to exclude the presence of a meningioma.
authors.affiliation: Moorfields Eye Hospital, London.
authors.forename: A A
authors.initials: AA
authors.lastname: Mcnab
authors.forename: J E
authors.initials: JE
authors.lastname: Wright
mesh_terms: D000328:Adult; D003560:Cysts / Q000150:complications* / Q000175:diagnosis; D004172:Diplopia / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000150:complications* / Q000175:diagnosis; D008579:Meningioma / Q000150:complications* / Q000175:diagnosis; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000150:complications* / Q000175:diagnosis; D014057:Tomography, X-Ray Computed; D014792:Visual Acuity