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.Otoneurological examination showed profound sensorineural hearing disturbance and spontaneous horizontal and rotatory nystagmus toward the right in both eyes indicating left peripheral vestibular dysfunction.Vertebral angiography showed occlusion of the basilar artery leading to circulatory insufficiency of the left AICA and PICA.After conservative treatment, the hearing disturbance and vertigo were reduced as the blood flow increased in the left AICA and PICA.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.