Squamous Cell Carcinoma Arising in a Parotid Warthin's Tumor: A Case Report and Literature Review.

Warthin's tumor is the second most common benign neoplasm of the parotid gland. Epithelial malignant transformation of Warthin's tumor, especially to squamous cell carcinoma, is a rare event. The authors present a case report of a 57-year-old male patient with a mass in the left parotid gland. This paper documents the appearance of squamous cell carcinoma within Warthin's tumor of the left parotid gland and reviews the other similar features of 12 cases.