Isolated Vertigo Caused by Anterior Inferior Cerebellar Artery Infarction -A Case Report

由前下小腦動脈梗塞引起的暈眩症--病例報告

10.6440/TZUCMJ.199909.0279

馮清世(Chin-Shih Fong)

暈眩症 ； 前下小腦動脈梗塞 ； 高血壓 ； 糖尿病 ； 核磁共振 ； vertigo ； AICA infarct ； hypertension ； diabetes mellitus ； magnetic resonance imaging

慈濟醫學雜誌

11卷3期（1999 / 09 / 01）

279 - 283

英文

前下小腦動脈梗塞不多見。周邊顏面神經麻痺、耳聾、耳鳴及三叉感覺異常為其常見的病徵，但只以暈眩症表現的前下下小腦動脈梗塞更是罕見。本文報告一位急性暈眩症的46歲女性病人，她有腦血管疾病的危險因子及眼球震顫，步履運動失調和肢體辨距障礙。核磁共振掃瞄顯示前下小腦動脈所支配的中小腦腳，前下小腦及小葉產生梗塞徵象。由眼球震顫和步履運動失調無法區分中樞性或周邊性之暈眩症，因此前下小腦動脈梗塞與週邊前庭病變可產生臨床相似的症狀。有腦中風危險因子的病人，若有急性暈眩症和肢體辨距障礙時，應考慮到前下小腦動脈梗塞引起之可能性。

Anterior inferior cerebellar artery (AICA) infarct occurs infrequently. Peripheral facial palsy, deafness, tinnitus, and trigeminal sensory deficit are common presentations. Vertigo as the only clinical feature of AICA infarct is rare. A 46-year-old woman with an acute vertigo attack is presented. She had risk factors for cerebrovascular diseases. At the time of infarction, she developed nystagmus, gait ataxia, and limb dysmetria. Magnetic resonance imaging (MRI) on 72-weighted images showed hyperintense lesions in middle cerebellar peduncle, anterior inferior cerebellum, and flocculus corresponding to the distribution of AICA. Since nystagmus and gait ataxia do not distinguish between the central or peripheral causes of vertigo, AICA infarct could masquerade as peripheral vestibular lesions. A high suspicion of AICA infarction should be considered in managing patients with acute vertigo and limb dysmetria, especially in patients with risk factors for stroke.