lymphoepithelial carcinoma in orbit

A middle age man with manifestation of right eye swelling and without pain, eye movement disability and exophthalmos. CT scan was made to define the limitation and location of the tumor. A 3.0mm*2.5mm tumor was extracted from the upper orbit in the surgery. Pathology and immunization results demonstrated as follow:

I supposed that the tumor was a metastatic one. Maybe origined from nasopharynxor sinus nearby. But the CT image didn’t show anything.

There were four articles mentioned in the pubmed.
1. [On a primary lymphoepithelial tumor (Schmincke) of the orbit]
2. A 20-year series of orbital exenteration.
3. Lymphoepithelial carcinoma of the maxillary sinus with orbital invasion.
4. Visual loss secondary to orbital apex invasion as the first manifestation of recurrent nasopharyngeal carcinoma.

This kind of tumor occured in orbit was rare and need more research.