Diagnosis and management of optic nerve sheath meningiomas.

Optic nerve sheath meningiomas account for a third of all intrinsic tumours of the optic nerve. Despite their classification as histologically benign tumours they cause progressive visual loss that often leads to blindness if left untreated. Recent therapeutic advances have increased the treatment options available to clinicians but patient management remains controversial. We systematically review the progress made in the diagnosis and management of optic nerve sheath meningiomas, clarify current best practice, and suggest future avenues for research.