Abstract
Between 1990 and 2002, 91 cases underwent excision of parotid tumors at St. Marianna University School of Medicine. The most prevalent tumor among benign parotid tumors was pleomorphic adenoma (52.8%), followed by Warthin's tumor (33.3%). Malignant tumors (20.9%) consisted of 4 adenocarcinomas, 3 metastases, 2 carcinomas in pleomorphic adenoma, 2 squamous cell carcinomas, and 2 undifferentiated carcinomas. Tumors that were accompanied by spontaneous pain or facial nerve palsy were frequently malignant. It is important to diagnose parotid tumors by the history, symptoms, and local findings. Ultraysound examination and MRI showed a high accuracy rate (73-80%). The incidence of facial palsy was 4.1% in benign tumors and 10.5% in malignant tumors.
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