Case 52 : MRI Orbit

50F with altered vision

Mass lesion seen encircling the optic nerve. No optic nerve involvement seen


Optic Nerve Sheath Meningioma


Benign tumor arising from the optic nerve sheath

Associated with NF Type II (these can be bilateral)

T1 iso to hypo to optic nerve, T2: iso-hyper to optic nerve

Enhance on contrast exam