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Dr. James
Smirniotopoulos responds:
There are many potential causes of symmetric optic nerve complex enhancement,
including optic neuritis (which itself has many causes including infection
and sarcoidosis), optic nerve glioma and optic nerve meningioma, and CSF
spread of neoplasm or infection.
If the enhancement is truly in the sheath itself, and not involving the
nerve, then it might be dural/arachnoid enhancement that could be the result
of any irritation to the meninges: subarachnoid hemorrhage, infection, etc.
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