title: Opacification of an optic nerve sheath cystic tumor with intrathecally injected metrizamide.
mesh_terms: D000293:Adolescent; D003560:Cysts / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008793:Metrizamide; D009901:Optic Nerve Diseases / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed
chemical_list: D008793:Metrizamide