めまい症例に対する神経血管減圧手術の経験

概要

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Two cases which showed sensorineural hearing loss, tinnitus and vertigo were reported. In both cases, the anterior cerebellar artery compressed the eighth nerve.<BR>In the first case, the sensorineural hearing loss recovered after displacing the nerve. Vertigo also improved after operation, and the nature of the tinnitus changed remarkably.<BR>In the second case, the sensorineural hearing loss and pulsating tinnitus seemed to occur by neurovascular compression. After operation, pulsating tinnitus reduced markedly, however the sensorineural hearing loss unchanged.<BR>From these findings, neurovascular compression must be considered as a possible cause for the sensorineural hearing loss, tinnitus and vertigo.<BR>We discuss the relationships between neurovascular compression and lesion of the eighth nerve from our two cases and other reports in the literature.