Related Experiment Video
Updated: Feb 5, 2026
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A Unified Methodological Framework for Vestibular Schwannoma Research
Published on: June 20, 2017
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A marked decrease in speech intelligibility is no longer a major characteristic of vestibular schwannoma in the
Masafumi Ueno1,2, Makoto Hosoya1,2, Hirotaka So1
1Department of Otorhinolaryngology, Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan.
Clinical and Experimental Otorhinolaryngology
|February 4, 2026
Summary
Speech intelligibility in vestibular schwannoma (VS) is strongly linked to hearing levels. While VS can affect speech, it
Area of Science:
- Neuroscience
- Audiology
- Otolaryngology
Background:
- Vestibular schwannoma (VS) is a tumor affecting the auditory and balance nerves.
- Markedly decreased speech intelligibility is often cited as a key symptom of VS.
- The precise relationship between speech intelligibility and hearing loss severity in VS requires further clarification.
Purpose of the Study:
- To investigate the correlation between speech intelligibility and hearing levels in patients with unilateral vestibular schwannoma.
- To compare speech discrimination in VS patients with those experiencing asymmetric cochlear hearing loss.
Main Methods:
- Analysis of pure tone audiometry (PTA) thresholds and speech discrimination scores in 473 VS patients.
- Scatter plots and simple regression analysis were used to assess correlations.
- Comparison with 173 patients with asymmetric cochlear hearing loss.
Main Results:
- A strong correlation exists between speech discrimination scores and PTA thresholds in VS patients, irrespective of tumor grade or audiogram shape.
- Speech discrimination in VS patients showed no significant difference from those with asymmetric cochlear hearing loss in most cases.
- While unserviceable speech discrimination was more common in VS, significant differences were only noted in severe hearing loss cases.
Conclusions:
- The severity of speech discrimination impairment in vestibular schwannoma is closely related to the degree of hearing loss.
- A markedly decreased speech discrimination score is not a defining characteristic of vestibular schwannoma when considered in conjunction with hearing levels.
- Further research may refine understanding of auditory pathway involvement in VS.
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