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Updated: Feb 5, 2026

A Unified Methodological Framework for Vestibular Schwannoma Research

A Unified Methodological Framework for Vestibular Schwannoma Research

Published on: June 20, 2017

聴覚神経腫の現在の時代における音声明瞭度の著しい低下はもはや主要な特徴ではない

Masafumi Ueno^1,2, Makoto Hosoya^1,2, Hirotaka So¹

¹Department of Otorhinolaryngology, Head and Neck Surgery, Keio University School of Medicine, Tokyo, Japan.

Clinical and experimental otorhinolaryngology

|February 4, 2026

要旨

Objectives:

A markedly decreased speech intelligibility is reported to be a major feature of vestibular schwannoma (VS); however, details such as the relationship between speech intelligibility and hearing levels have not yet been adequately clarified.

Methods:

Among 473 patients with sporadic unilateral vestibular schwannoma, scatter plots of pure tone audiometry (PTA) thresholds and speech discrimination scores were created. Simple regression analysis was conducted, and the Pearson correlation coefficient was calculated. The results were compared with those of 173 patients with asymmetric cochlear hearing loss, including the percentage of patients with unserviceable speech intelligibility.

Results:

In patients with vestibular schwannoma, a strong correlation was found between the speech discrimination score and PTA threshold on the affected side, regardless of Koos grade or audiogram shape. In most patients, there was no significant difference in distribution compared with patients with asymmetric cochlear hearing loss. Although the proportion of patients with unserviceable speech discrimination was higher for vestibular schwannoma than asymmetric cochlear hearing loss across all hearing levels, the condition was limited to a small number of cases; a significant difference was only observed in cases with severe hearing loss.

Conclusion:

Considering its relationship with hearing level, a markedly decreased speech discrimination score is no longer a major feature of vestibular schwannoma.

キーワード:

非対称性蝸牛性難聴相関係数聴力損失 Koos分類純音聴力検査閾値回帰分析感音性難聴音声明瞭度音声知覚前庭神経鞘腫

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