title: Cyst of the intraorbital optic nerve sheaths.
abstract: A 43-year-old woman had a history of gradual unilateral visual acuity loss and proptosis. A 2.5-cm cystic dilatation of the intraorbital dura mater was removed. Microscopic examination revealed a vascular proliferation within the leptomeninges. We inadvertently injected the lesion during orbitography, providing us with an unusual radiographic appearance.
mesh_terms: D003560:Cysts / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D005260:Female; D006391:Hemangioma / Q000150:complications; D006801:Humans; D008578:Meninges; D008875:Middle Aged; D009900:Optic Nerve / Q000473:pathology; D009901:Optic Nerve Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D009915:Orbit / Q000098:blood supply; D010690:Phlebography; D014463:Ultrasonography