A case of pinealoma with central dysacusis.

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  • 中枢性難聴を呈した松果体腫ようの１症例

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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.<br>Electronystagmography showed an abnormal eye movement which we suspected to be ocular myoclonus.<br>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.<br>After his intracranial pressure had been reduced to normal by drainage, his speech discrimination score recovered and the abnormal eye movement also declined.<br>We considered that the lesion causing those symptoms was located around the inferior colliculus.

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