What is vestibular schwannoma (acoustic neuroma)?

Updated: Mar 13, 2017
  • Author: Hesham M Samy, MD, PhD; Chief Editor: Robert A Egan, MD  more...
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Answer

Vestibular schwannoma (acoustic neuroma) is an uncommon lesion (incidence, 1.1 per 100,000) that typically manifests with slowly progressive unilateral hearing loss and tinnitus. Dizziness is not common, because the vestibular system can usually compensate for such gradual unilateral hypofunction. Dizziness can occur as the tumor expands in the cerebellopontine angle and effaces the brainstem and cerebellum. Arachnoid cysts can also occur in the posterior fossa and result in subtle and nonspecific dizziness and auditory symptoms.


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