Lymphoepithelial cysts of the parotid region: a "new face" on an old lesion.

Lymphoepithelial cysts of the parotid gland and its lymph nodes have been known for nearly 100 years, but only in the past half-decade have they gained clinical prominence, if not significance. The lymphoepithelial cysts can now be added to the growing list of clinicopathologic manifestations of human immunodeficiency virus-associated diseases.