A Case of Parotid Gland Warthin Adenocarcinoma

Abstract

Warthin’s tumors are benign salivary-gland tumors whose rare malignant change has, to our knowledge, been reported in only 39 cases. We report a case of parotid Warthin adenocarcinoma arising from a preexisting parotid epithelial component. The case was of a 43-year-old woman reporting a 3-month history of right parotid swelling. We conducted right parotidectomy without complications of facial nerve palsy. Histologically, this tumor was diagnosed as adenocarcinoma aring from Warthin’s tumor. The woman shows no evidence of recurrence. Because of their rarity, malignant Warthin’s tumor cannot be evaluated accurately, and the identification of additional cases would help better elucidate the tumor.