Bilateral multiple basal cell adenomas of the parotid gland were found in a 77-year-old woman. The patient was referred with a 6 year history of painless and slowly growing masses in both parotid areas. Bilateral removal of the parotid masses was perfomed. Surgery revealed the presence of four isolated masses; one in each of the superficial and deep lobes on the right side, and two in the left superficial lobe. Histologic examination showed tubular type basal cell adenoma. Bilateral parotid gland tumors have rarely been reported. They are chiefly Warthin's tumors. The incidence of basal cell adenoma of the parotid gland is about 2%, but a review of the literature indicates that bilateral or multiple occurrence of this type of adenoma is extremely rare.
