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Related Experiment Videos

Auditory brain stem response in small acoustic neuromas.

H K El-Kashlan1, D Eisenmann, P R Kileny

  • 1Department of Otolaryngology-Head and Neck Surgery, University of Michigan, Ann Arbor, USA.

Ear and Hearing
|July 13, 2000
PubMed
Summary

Auditory brain stem response (ABR) effectively detects small acoustic neuromas (ANs) in 92% of cases. This screening method remains valuable, particularly for elderly patients or when suspicion is low.

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Area of Science:

  • Neurology
  • Otolaryngology
  • Diagnostic Imaging

Background:

  • The auditory brain stem response (ABR) has faced recent criticism regarding its sensitivity in detecting small acoustic neuromas (ANs).
  • Accurate and timely diagnosis of ANs is crucial for effective patient management and treatment planning.

Purpose of the Study:

  • To evaluate the efficacy of ABR in detecting small acoustic neuromas.
  • To assess the diagnostic performance of ABR for small ANs based on institutional experience.

Main Methods:

  • A retrospective case review of 25 patients with surgically confirmed small ANs (≤1 cm) was conducted.
  • An additional 568 patients who underwent screening ABR were analyzed to determine the rate of false positive results.

Main Results:

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  • ABR testing yielded abnormal results in 92% of patients diagnosed with small acoustic neuromas.
  • Approximately 19% of screening ABRs were abnormal, with one-third of these cases subsequently diagnosed with AN via magnetic resonance imaging.

Conclusions:

  • The ABR, when performed with optimal technique and evaluation criteria, is a viable tool for screening acoustic neuromas.
  • ABR screening is particularly recommended for elderly patients or in cases with a low index of clinical suspicion for AN.