A case of pinealoma with central dysacusis.

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A 18-year-old male was examined for bilateral hearing loss. His pure tone audiometer test showed normal hearing, but his speech discrimination score was 15% in the right ear and 20% in the left.Electronystagmography showed an abnormal eye movement which we suspected to be ocular myoclonus.A CT scan showed a pineal gland tumor and enlarged ventricles. His intracranial pressure was above 380 mmHg; the exact level could not be measured.After his intracranial pressure had been reduced to normal by drainage, his speech discrimination score recovered and the abnormal eye movement also declined.We considered that the lesion causing those symptoms was located around the inferior colliculus.
耳鼻咽喉科臨床学会の論文