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Diagnostic features of the auditory brainstem response in identifying cerebellopontine angle tumours.

This report concerns the diagnostic features of the ABR which are most effective in identifying patients with cerebellopontine angle tumours. The conclusions are based on the results of 40 normal subjects, 35 patients without a cerebellopontine angle tumour and 68 patients without a tumour. One hundred per cent of the tumour patients and ten per cent of the non-tumour patients had abnormal ABR results.