<unk>  (or<unk><unk> , a form of<unk>  which affects the<unk>  nerve, is often one of the central nervous system manifestations of neurofibromatosis 1.<unk><unk> s are usually pilocytic tumors, and can involve the<unk>  nerve or<unk>  chiasm.<unk><unk> s are usually associated with neurofibromatosis type 1 in 30% of people with the condition.<unk> s have low mortality but extremely high prevalence of vision loss & eye-bulging exophthalmos) in children. As of 2014, approximately 1000 cases had been reported.
Optic nerve glioma
Optic nerve tumor
Optic nerve sheath meningioma
Intraocular schwannoma
Intraocular lymphoma
Labyrinthine fistula
Orbital lymphoma
Autoimmune optic neuropathy