副耳下腺に発生したWarthin腫瘍の1例

Warthin's Tumor Arising in the Accessory Parotid Gland: A Case Report

I．はじめに

　副耳下腺由来の腫瘍は，辻本ら^1）が記載したごとく，ごく稀なものであり，Johnsonら^2）によれば耳下腺腫瘍のほぼ1％の頻度である。また，その組織型は悪性腫瘍が比較的多く，良性腫瘍では，やはりpleomorphic adenomaが多い。一方，Warthin腫瘍は諸家の報告^3,4,5,6）をみると，耳下腺腫瘍の5〜10％程度に認められているが，副耳下腺のWarthin腫瘍に関しては，Perzikら^7）の報告の46例中に1例をみるのみで，極めて稀である。

　今回われわれは，副耳下腺に発生したWarthin腫瘍の1例を経験したので，文献的考察を加え報告する。

　A rare case of Warthin's tumor arising in the accessory parotid gland in a 43-year-old female is reported. Accessory parotid tumors are very rare, comprising 1% of all primary parotid tumors. On the other hand, Warthin's tumor comprises about10% of parotid tumor. Although Warthin's tumor in the parotid gland is relatively common, there is only one report of Warthin's tumor arising in the accessory gland.

　If a facial tumor located in the midst of the cheek.one should not neglect the possibility of accessory parotid tumor. In surgery a preauricular lazy-S incision should be essential in order to prevent damaging any branches of the facial nerve and producing a salivary fistula.