[Unilateral parotid gland involvement with synchronous pleomorphic adenoma and lymphoepithelial carcinoma: a case report and literature review].

Unilateral parotid gland involvement with synchronous benign and malignant tumors is extremely rare. This paper reported 1 case of primary unilateral pleomorphic adenoma and lymphoepithelial carcinoma of parotid gland and reviewed the literatures. The clinical diagnostic procedure and the necessary indication of pathological diagnosis was outline in the paper.