特発性解離性浅側頭動脈瘤の1例

A Case of an Idiopathic Dissecting Aneurysm of the Superficial Temporal Artery: A Case Report

Ⅰ．はじめに

　浅側頭動脈瘤は臨床の場でときに経験する疾患の1つである．多くは外傷後2～6週後に自覚され⁹⁾，偽性動脈瘤の形態を呈することが多い^1,3,4,13,14)．今回われわれは，明らかな外傷歴がない特発性解離性浅側頭動脈瘤の1例を経験した．極めて稀な症例であり，興味深い血管造影所見を呈したのでこれを報告する．

　Aneurysms of the superficial temporal artery are usually traumatic in origin and are pseudoaneurysms. We present a rare case of an idiopathic dissecting aneurysm of the superficial temporal artery in a 40-year-old man without history of trauma. The patient had a pulsatile mass in the left temporal region. Angiography showed a fusiform dilatation at the left superficial temporal artery and both the true lumen and the false lumen were recognized. Resection of the aneurysm was performed. Postoperatively,the patients complaints disappeared completely. Histopathological examination of the specimen revealed a dissecting aneurysm. We investigated the histological findings by comparing them to angiographical findings.