title: Arachnoid hyperplasia in optic nerve glioma.
mesh_terms: D000293:Adolescent; D000328:Adult; D001099:Arachnoid / Q000473:pathology*; D002648:Child; D002675:Child, Preschool; D003390:Cranial Nerve Neoplasms / Q000473:pathology*; D003951:Diagnostic Errors; D005910:Glioma / Q000473:pathology*; D006801:Humans; D006965:Hyperplasia; D008577:Meningeal Neoplasms / Q000473:pathology*; D008579:Meningioma / Q000473:pathology*; D009901:Optic Nerve Diseases / Q000473:pathology*