Isolated Flocculus Infarction Mimicking Acute Labyrinthitis

J Korean Neurol Assoc > Volume 29(3); 2011 > Article

Journal of the Korean Neurological Association 2011;29(3): 241-245.

급성 미로염으로 발현한 소뇌 타래 경색

김도형, 이주희a 오선영a,b 신병수a,b

전북대학교 의학전문대학원 신경과학교실a, 전북대학교병원 임상의과학연구소b

Isolated Flocculus Infarction Mimicking Acute Labyrinthitis

Do-Hyung Kim

Department of Neurologya, Chonbuk National University School of Medicine, Jeonju, KoreaResearch Institute of Clinical Medicineb, Chonbuk National University Hospital, Jeonju, Korea

Abstract

Acute vestibular syndrome characterized by vertigo, spontaneous nystagmus, and postural instability is caused by a unilateral injury to either peripheral or central vestibular structures. However, central vestibular syndromes, such as labyrinthine ischemia due to occlusion of anterior inferior cerebellar artery (AICA), may cause abrupt unilateral labyrinthine dysfunction that mimics peripheral vestibulopathy. Here we report an AICA infarction with isolated flocculus lesion on magnetic resonance imaging mimicking acute labyrinthitis with vertigo, unidirectional horizontal-torsional nystagmus, ipsilesional sensorineural hearing impairment, and positive head-thrust test without any typical findings of floccular lesion. KeyWords:Acute peripheral vestibulopathy, Flocculus, Anterior inferior cerebellar artery