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Oculoplastics/Orbit
Optic nerve sheath meningioma. A, Swollen right optic nerve with tortuous arteries and dilated veins. B, Normal left optic nerve. Axial T1-weighted, gadolinium-enhanced MRI (C) and coronal contrast-enhanced (D) scans show optic nerve sheath meningioma. Note enlargement of the optic nerve sheath.