Enlargement of the optic nerves is uncommon. Swelling of the optic nerves has a surprisingly broad differential.
Etiology
-
neoplastic
- optic nerve glioma
- optic nerve meningioma
- leukemia
- orbital lymphoma
- metastases
- juvenile xanthogranuloma
- medulloepithelioma
- involvement by retinoblastoma
- cyst of optic nerve sheath
- non-malignant infiltrative disease
- metabolic anomalies
- inflammatory
-
vascular lesion
- perioptic hemorrhage
- central retinal vein occlusion
- aneurysm of ophthalmic artery
- hemangioma
- varix
- venous occlusion
- others