Bilateral idiopathic inflammatory perioptic neuritis simulating optic nerve sheath meningioma on computed tomography

Idiopathic inflammatory perioptic neuritis is a rare inflammatory condition of the optic nerve sheaths. The differential diagnosis is important because the disease has radiologic findings resembling those of optic nerve sheath meningioma and management is quite different in each condition. A case of bilateral idiopathic inflammatory perioptic neuritis is reported in which the computed tomographic (CT) appearance simulated optic nerve sheath meningioma and there was progressive visual loss. Presented as a scientific poster at the XIth Congress of the European Society of Ophthalmology, Hungary, Budapest, June 1–5, 1997.