title: High-resolution CT of lesions of the optic nerve.
abstract: The optic nerves are well demonstrated by high-resolution computed tomography. Involvement of the optic nerve by optic gliomas and optic nerve sheath meningiomas is well known. However, nonneoplastic processes such as increased intracranial pressure, optic neuritis, Grave ophthalmopathy, and orbital pseudotumor may also alter the appearance of the optic nerve/sheath on computed tomography. Certain clinical and computed tomographic features permit distinction of these nonneoplastic tumefactions from tumors.
mesh_terms: D003390:Cranial Nerve Neoplasms / Q000000981:diagnostic imaging*; D005910:Glioma / Q000000981:diagnostic imaging; D006111:Graves Disease / Q000000981:diagnostic imaging; D006801:Humans; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging; D008579:Meningioma / Q000000981:diagnostic imaging; D009900:Optic Nerve / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D009901:Optic Nerve Diseases / Q000000981:diagnostic imaging*; D009902:Optic Neuritis / Q000000981:diagnostic imaging; D009916:Orbital Diseases / Q000000981:diagnostic imaging; D011559:Pseudotumor Cerebri / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed