What is the role of brainstem auditory evoked potential (BAEP) testing in the workup of cerebellopontine angle lesions (acoustic neuromas)?

Updated: Oct 25, 2019
  • Author: Andrew B Evans, MD; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Answer

The BAEP may be abnormal when audiometry fails to disclose a lesion. The characteristic findings are increased I-V and increased I-III interpeak latencies ipsilateral to the lesion. Meningiomas and other cerebellopontine angle tumors may not produce any abnormalities until they are large enough to be externally compressive.


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