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Necrotizing neurosarcoidosis masquerading as a left optic nerve meningioma: case report
Jack W Jennings1, Amyn M Rojiani, Steven S Brem
1Department of Anatomy, University of South Florida College of Medicine, Tampa, FL, USA.
Abstract:
Isolated neurosarcoidosis involving the optic nerve meninges is extremely rare and is often indistinguishable from a meningioma in its anatomic site and MR imaging presentation. Characteristic findings include enhanced perineural encasement and thickening of the affected optic nerve on contrast-enhanced T1-weighted cranial MR imaging studies. We present the case report of a patient with isolated necrotizing neurosarcoidosis of the left optic nerve, with clinical and MR imaging findings strongly suggestive of a preoperative diagnosis of a meningioma.
Insights
Isolated neurosarcoidosis affecting optic nerve meninges is rare and mimics meningioma on MRI. Characteristic findings include perineural enhancement and nerve thickening, crucial for diagnosis.
Area of Science:
- Neurology
- Ophthalmology
- Radiology
Background:
- Neurosarcoidosis is a rare granulomatous disease affecting the nervous system.
- Isolated optic nerve sheath involvement is exceptionally uncommon.
Observation:
- A patient presented with clinical and imaging findings mimicking a meningioma.
- Magnetic resonance imaging revealed characteristic perineural encasement and thickening of the optic nerve.
Findings:
- The case highlights isolated necrotizing neurosarcoidosis of the optic nerve.
- Preoperative diagnosis was strongly suggestive of a meningioma due to imaging similarities.
Implications:
- Distinguishing neurosarcoidosis from meningioma is critical for appropriate treatment.
- Enhanced MRI sequences are vital for identifying subtle signs of perineural inflammation.