Isolated labyrinthine infarction as a harbinger of anterior inferior cerebellar artery
territory infarction with normal diffusion-weighted brain MRI
- Affiliated Author(s)
- 조경희; 이형
- Alternative Author(s)
- Cho, Kyung Hee; Lee, Hyung
- Journal Title
- Journal of the Neurological Sciences
- ISSN
- 0022-510X
- Issued Date
- 2009
- Keyword
- Inner ear; Anterior inferior cerebellar artery; Infarction; Prodrome
- Abstract
- Objectives:
This paper aims to determine the frequency of isolated labyrinthine infarction as an initial manifestation of anterior inferior cerebellar artery (AICA) territory infarction and discuss its clinical implication.
Methods:
We studied 54 consecutive patients with AICA infarction diagnosed by brain MRI from the acute stroke registry.
Results:
We identified 4 patients (7.4%) with AICA territory infarction who initially presented with vertigo and hearing loss mimicking acute labyrinthitis and subsequently suffered from delayed neurological deficits. All patients had normal brain MRIs including diffusion-weighted images at the time of isolated audiovestibular loss, but all subsequently exhibited acute infarct(s) in the AICA territory on follow-up brain MRIs when they developed additional neurological deficits.
Conclusion:
Labyrinthine infarction may be a warning sign of impending pontocerebellar infarction in the AICA territory. Our results indicate that even a classical peripheral presentation, e.g., acute hearing loss, and acute vertigo with unidirectional nystagmus, may be a manifestation of ischemic stroke in the posterior circulation.
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