Orbital metastasis as the primary presentation of nasopharyngeal carcinoma.

etastasis to the orbit, which is uncommon due to the haracter of the orbital volume with relative stenosis, is stimated to account for 1--13% of all orbital tumors.1 rbital metastasis is believed to occur in approximately --3% of patients with systemic cancer.2 The incidence f metastatic orbital tumors varies widely, according to eographical area and race; the most common primary caners that metastasize to the orbit are breast, prostate, iver, and lung cancer.1,2 Although nasopharyngeal carcinoma NPC) involves the orbits through direct extension to the rbital apex, metastasis of NPC to the orbit has rarely been eported. This report describes two cases of intraorbital, xtrabulbar metastases from NPC.