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Contralateral auditory brainstem response abnormalities in acoustic neuroma

  • D. A. Moffat (a1), D. M. Baguley (a1), D. G. Hardy (a1) and Y. N. Tsui (a1)

Abstract

Contralateral Auditory Brainstem Response (ABR) findings in a series of 79 patients with unilateral acoustic neuroma are presented. Sixty-four patients (81 per cent) had a normal contralateral ABR, thirteen (16.4 per cent) had latency abnormalities contralaterally and in two patients (206 per cent) no consistent responses could be recorded despite good hearing. Abnormalities in the contralateral ABR were analysed and five patients had abnormal III-V interwave intervals, in seven patients the I-III intervals were abnormal and in one patient, only the fifth wave was present and of abnormal latency. The tumour size was assessed by computed axial tomography (CT) and the relationship between tumour size and contralateral ABR findings established. Large tumours (>2.5 cm.) were associated with contralateral ABR abnormalities in 25.6 per cent of the patients, medium tumours (1.0-2.5 cm.) with ABR abnormalities in 14 per cent and there were no abnormalities in the small group (intracanalicular). The implications for interpretation of ABR recordings contralateral to an acoustic neuroma are discussed in relation to brainstem compression and its effect on the wave generator sites.

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Corresponding author

D. A. Moffat F.R.C.S., Department of Otolaryngology, Addenbrooke's Hospital, Hills Road, Cambridge CB2 2QQ

References

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Baguley, D. M., Moffat, D. A. and Nigam, A. (1988) Disposable electrodes in audiometory. British Journal of Audiology, 22, 3, 219222.
Barrs, D. M., Brackmann, D. E., Olson, J. E. and House, W. F. (1985) Changing concepts of acoustic neuroma diagnosis. Archives of Otolaryngology, 111: 1721.
Bridger, M. W. M. and Farkashidy, J. (1980) The distribution of neuroglia and Schwann cells in the VIIIth nerve of man. Journal of Laryngology and Otology, 94: 13531362.
Croxson, G. R., Moffat, D. A. and Baguley, D. M. (1988) Bruns bidirectional nystagmus in cerebellopontine angle tumours. Clinical Otolaryngology, 13: 153157.
Hall, J. W. (1983) Auditory brainstem response audiometry. In Jerger, J. (ed), Hearing disorders in adults: current trends. College Hill Press, San Diego.
Johnson, E. W. and Selters, W. A. (1987) Audiological evaluation for neurotological diagnosis. In House, J. W. and O'Connor, A. F. (eds) Handbook of Neurotological Diagnosis, Marcel Dekker Inc, New York, p. 6582.
Lynne, G. E. and Verma, N. P. (1985) ABR in upper brainstem lesions. In Jacobson, J. T. (ed) The auditory brainstem response, Taylor and Francis, London, p. 203218.
Moffat, D. A., Hardy, D. G., Baguley, D. M. (1989) The strategy and benefits of acoustic neuroma searching. Journal of Laryngology and Otology, 103: 5159.
Moller, M. B. and Moller, A. R. (1983) Brainstem auditory evoked potentials in patients with cerebellopontine angle tumours. Annals of Otology, Rhinology and Laryngology, 92: 645650.
Musiek, F. E. (1982) ABR In eighth nerve and brainstem disorders. American Journal of Otology, 3, 3: 243248.
Musiek, F. E. and Kibbe, K. (1986) Auditory brainstem response wave IV-V abnormalities form the ear opposite large cerebellopontine lesions. American Journal of Otology, 7, 4: 253257.
Nodar, R. H. and Kinney, S. E. (1980) The contralateral effects of large tumours on brainstem auditory evoked potentials. Laryngoscope, 90: 17621768.
Pfleiderer, A. G., Evans, K. L., Grace, A. R. H. and Lloyd, G. A. S. (1988) A screening protocol used for the detection of acoustic neuromas: a clinical evaluation. Clinical Otolaryngology, 13: 145151.
Rosenhamer, H. (1981) ABR in cerebellopontine angle tumours. Scandinavian Audiology, Supplement 13: 116.
Selters, W. and Brackmann, D. (1977) Acoustic tumour detection with brainstem electric response audiometry. Archives of Otolaryngology, 103: 181187.
Zapulla, R. A., Greenblat, E. and Karmel, B. Z. (1982) The effects of acoustic neuromas on ipsilateral and contralateral brainstem auditory evoked potentials during stimulation of the unaffected ear. American Journal of Otology, 4: 118122.

Contralateral auditory brainstem response abnormalities in acoustic neuroma

  • D. A. Moffat (a1), D. M. Baguley (a1), D. G. Hardy (a1) and Y. N. Tsui (a1)

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