J Korean Neurol Assoc.  2011 Aug;29(3):241-245.

Isolated Flocculus Infarction Mimicking Acute Labyrinthitis

Affiliations
  • 1Department of Neurology, Chonbuk National University School of Medicine, Jeonju, Korea. ohsun@jbnu.ac.kr
  • 2Research Institute of Clinical Medicine, 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.

Keyword

Acute peripheral vestibulopathy; Flocculus; Anterior inferior cerebellar artery

MeSH Terms

Arteries
Ear, Inner
Hearing Loss
Infarction
Ischemia
Labyrinthitis
Magnetic Resonance Imaging
Vertigo
Vestibular Neuronitis
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