Brainstem Infarction with Acute Sensorineural Hearing Loss. A Case Report.

DOI 7 Citations 25 References
  • Nasu Takashi
    Department of Otolaryngology, Yamagata University School of Medicine
  • Nakamura Tadashi
    Department of Otolaryngology, Yamagata University School of Medicine
  • Yokota Masashi
    Department of Otolaryngology, Yamagata University School of Medicine
  • Koike Shuji
    Department of Otolaryngology, Yamagata University School of Medicine
  • Aoyagi Masaru
    Department of Otolaryngology, Yamagata University School of Medicine

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Other Title
  • 急性感音難聴で発症した脳幹梗塞の１例
  • A Case Report

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Abstract

A patient with acute hearing loss and vertigo due to infarction involving the anterior--inferior cerebellar artery (AICA) is reported.<BR>A 64-year-old female complained of sudden-onset, severe, unilateral hearing loss and vertigo without any other neurological deficits. Neuro-otological examinations revealed a horizontal, spontaneous, positional, and gaze nystagmus toward the right. Pursuit eye movement and optokinetic nystagmus were unilaterally impaired and ABR showed the absence of waves II-IV and prolonged I-V interpeak latency difference. Based on finding of neuro-otological examination, brain stem lesion was suspected and neuroradiological examinations were performed. MRI showed a pontine infarction in the AICA area and angiography demonstrated stenosis of the right AICA thus the patient was diagnosed as having AICA syndrome.<BR>The clinical signs of AICA syndrome are occasionally similar to those of inner ear disorders. In such cases, neuro-otological examinations such as ENG and ABR are clinically useful in distinguishing AICA syndrome from inner ear diseases.

Journal

  • Equilibrium Research

    Equilibrium Research 57 (3), 289-296, 1998

    Japan Society for Equilibrium Research

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