抄録
Bilateral parotid gland tumors are uncommon. We report the first known case of pleomorphic adenoma on the left and monomorphic adenoma on the right. Histologically, the left tumor had the typical features of a pleomorphic adenoma. There were many areas of epithelial tumor cells associated with typical myxoid areas. In the right tumor, the trabecular pattern contained epithelial tumor cells, and neither myxoid nor chondroid components were seen. The diagnosis was trabecular adenoma. Among bilateral parotid gland tumors, Warthins tumor is the most common, and pleomorphic adenoma is very rare. We review the literature on bilateral pleomorphic parotid gland adenomas and discuss the reason for their rarity.
