前後下小脳動脈不全による急性感音難聴例

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  • Acute sensorineural hearing disturbance with vertigo caused by circulatory insufficiency of anterior and posterior inferior cerebellar arteries; A case report.

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A 77-year-old male complained of acute left hearing disturbance with vertigo. A diagnosis of circulatory insufficiency of the left anterior inferior cerebellar artery (AICA) and the posterior inferior cerebellar artery (PICA) was made from the results of examinations and the clinical course.<br>Otoneurological examination showed profound sensorineural hearing disturbance and spontaneous horizontal and rotatory nystagmus toward the right in both eyes indicating left peripheral vestibular dysfunction.<br>Vertebral angiography showed occlusion of the basilar artery leading to circulatory insufficiency of the left AICA and PICA.<br>After conservative treatment, the hearing disturbance and vertigo were reduced as the blood flow increased in the left AICA and PICA.<br>Although sensorineural hearing disturbance with vertigo of sudden onset is usually diagnosed as sudden deafness in clinical practice, RICA and PICA circulation should be assessed for a precise diagnosis.

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