Residents should know the entity
Lymphoepithelial Disease
Reference:
Benign lymphoepithelial parotid cysts and hyperplastic cervical adenopathy in AIDS-risk patients: a new CT appearance. R A Holliday, W A Cohen, R A Schinella, S G Rothstein, M S Persky, J M Jacobs and P M Som. Radiology August 1988 168:439-441
http://radiology.rsna.org/content/168/2/439.short by our own Dr. Roy Holliday