抄録
Tumors of the parotid gland usually arise unilaterally and multiple tumors in the bilateral parotid glands are very rare. In this paper, we present a case of multiple Warthin's tumors in the bilateral parotid glands and also discuss 27 cases of Warthin's tumors. A 50-year-old man with multiple tumors in simultaneous bilateral parotid was treated at our hospital. Preoperative MRI showed five tumors in the right parotid gland and two in the left. Surgical extirpations were done under general anesthesia first on the right parotid gland and then on the left 11 days later. Histological examination revealed that they were Warthin's tumors. We studied 27 cases of Warthin's tumors treated at our hospital during the last 25 years. No significant differences were found in age and sex between bilateral and unilateral cases, while the average number of tumors was 2.8 in the bilateral cases and 1.3 in the unilateral cases.
