Last Updated: September 30, 2018
The orbit can be affected by a wide variety of lesions. Thyroid-associated orbitopathy, inflammatory lesions, vascular disorders, and orbital neoplasia are included in the differential diagnosis of masses within the orbit. Dysthyroid orbitopathy is an inflammatory condition of the orbit that is associated with enlargement of the extraocular muscles.
Orbital tumors can be classified into categories based on their etiology as lymphoproliferative lesions (non-Hodgkin's lymphoma is the most common malignant adult orbital tumor), optic nerve and meningeal lesions, lacrimal gland tumors, and secondary orbital tumors that extend into the orbit from nearby structures and metastases. For neurosurgeons, spheno-orb...