An orbital mass carries a wide differential.
Differential diagnosis
- tumors
- lymphoma
- metastasis
- lacrimal gland or duct tumors
- rhabdomyosarcoma of the orbit
- retinoblastoma
- optic nerve meningioma
- optic nerve glioma
- schwannoma (of trigeminal or other cranial nerves except optic)
- neurofibroma
-
developmental orbital cysts 3:
- choristoma
- epidermoid
- dermoid (external angular dermoid): commonest benign orbital tumor in childhood
- teratoma (rare)
- congenital cystic eye
- colobomatous cyst
- choristoma
- orbital pseudotumor
- orbital sarcoidosis
- vascular lesions
- trauma