耳介に発症した血管平滑筋腫の1例

Angiolciomyoma of the Auricle:Report of a Case

　はじめに

　血管平滑筋腫は，中年女性の下肢に好発する血管壁の平滑筋に由来する良性腫瘍である。しかし顔面および頭部に発症することは比較的稀であるとされ，しばしば誤った診断をされることがある。今回われわれは左耳介部に発症した血管平滑筋腫を経験したので，若干の文献的考察を加え報告する。

Angioleiomyoma of the auricle is a rare disor-der. A patient was initially suspected of having a epidermoid cyst of the auricle and later diagnosed as having angioleiomyoma by postoperative histopathological examination.

Occurrence of angioleiomyoma of the auricle differs from those the extremities and the trunk in frequency, average age, sex ratio, clinical feature and histopathological examination.

It has been reported that only 1.4 to 2.8% of all angioleiomyoma were found in the auricle, and the average age of the patients of the auriclar region is younger than those of the extremities and trunk. Females were more affected than males in all angioleiomyoma. The clinical features of the tumor in the auriclar region differ from those in the extremities and the trunk, especially in regard to spontaneous pain and tenderness.

According to Morimoto's histological classifica-tion, angioleiomyoma of the auriclar region is of capillary or solid type.