中耳内頚動脈走行異常により拍動性耳鳴を生じた1症例

Pulsatile Tinnitus due to an Aberrant Internal Carotid Artery in the Middle Ear:A Case Report

Ⅰ．はじめに

　耳鳴は心拍と同期する拍動性耳鳴と，同期しない非拍動性耳鳴に分類される¹⁴⁾．拍動性耳鳴の原因として多様な疾患が報告されている^7,14)．今回われわれは，拍動性耳鳴を認めた中耳内頚動脈走行異常の1症例を経験したので報告する．

　We report a rare case of aberrant internal carotid artery in the middle ear. The patient was a 30-year-old man with pulsatile tinnitus. MRA and 3D-CTA revealed an aberrant course of the internal carotid artery in the middle ear.

　3D-CTA proved useful for radiographic diagnosis, leading to the observation of an aberrant internal carotid artery passing the foramen.

　We discuss the diagnosis and management of such patients.