副耳下腺腫瘍—その臨床と文献的考察

Accessory Parotid Tumor: A Case Report

　I．緒言

　副耳下腺（accessory parotid gland）に発生する腫瘍は非常に稀で，本邦過去10年間の報告は筆者らが渉猟した限りでは1編もなく，外国での報告も数編みるにすぎない。

　Frommer^1）によれば剖検の約21％に副耳下腺が存在し，副耳下腺原発腫瘍は耳下腺腫瘍全体の約1％を占めるにすぎない稀な疾患である。

　A rare case of a 12-year-old girl with an accessory parotid tumor is reported and discussed with the referrence to the literature.

　Accessory parotid tumors comprising 1% of all primary parotid neoplasms usually present with asymptomatic buccal mass. The age at diagnosis varied from the third to the seventh decade. The spectrum of neoplasm is similar to that of tumors arising in the main parotid gland, although more than half of the neoplasms are malignant.

　Most of the malignant tumors are mucoepidermoid tumor which comprises the greater part of the malignant parotid tumors in children.

　Sialography and CT-scanning are occasionaly required for the diagnosis.