Risk Factors of Optic Nerve Sheath Meningioma

Unlike optic nerve gliomas, ONSMs are rare in children with mean age of presentation around 40 years of age, and slight female predilection of 2:1. If they happen to affect children, though, they tend to be more aggressive with faster growth, higher chances of bilaterality, and higher incidence of malignant transformation and spread into the CNS.