Vol.96 No.2 contentsPRACTICA OTO-RHINO-LARYNGOLOGICA
Vol. 96 No. 2 February 2003
Clinical Study of Parotid Tumors; 13-Year
Statistical Analysis of 91 Cases
Wataru Shimbashi, Shoji Watanabe, Miki Azuma, Ayuko Munemasa,
Atsuto Enami, Hiroya Iwatake and Izumi Koizuka
(St. Marianna University School of Medicine)
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.
Key words : parotid tumor, clinical analysis, MRI