It was a kind of poor differentiation or undifferentiated carcinoma with special histologic expression, the majority of infiltration lymphocytes comprised t cells.

Lymphoepithelial carcinoma in salivary gland is a very rare disease, which is undifferentiated or poorly differentiated carcinoma with redundant lymphocytes infiltrated.

Results expression of ECD was always lower in poor differentiation group than that in well differentiation group, but there was no significant correlation between ECD expression and metastasis.