Research in Vestibular Science

Original Article

Impairment of Vestibular Function in Patients with Vestibular Schwannoma According to the Presence of Dizziness: Youngjeong Lee, Se A Lee, Eek-Sung Lee, Tae-Kyeong Lee, Jong Dae Lee; Res Vestib Sci. 2022;21(3):75-79. Published online September 15, 2022; DOI: https://doi.org/10.21790/rvs.2022.21.3.75

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Abstract PDF: Objectives
Vestibular schwannoma (VS) is a benign Schwann cell-derived slow growing tumor originating from the vestibular nerve. Here, we aimed to investigate the correlation between the presence of the dizziness symptoms and several vestibular function test results.
Methods
We analyzed 32 patients who diagnosed with VS from 2010 to 2021 in our hospital. Caloric test, cervical vestibular-evoked myogenic potential (cVEMP) test, and video head impulse test (vHIT) were analyzed.
Results
Age, sex, pure tone audiometry, and tumor size did not show any statistical significance according to the presence or absence of dizziness. There was also no association between the presence of dizziness symptom or dizziness type and the results of the caloric test, vHIT, and cVEMP test, respectively. However, patients with dizziness had a higher rate of tumors confined to the inner auditory canal than those without dizziness.
Conclusions
In this study, the rate of complaints of dizziness was higer in patients with intracanalicular VS. The diagnostic role of vestibulsr function tests in VS is limited. The dissociation of the results of caloric test, vHIT, and cVEMP test suggest that these test are complementary.

Review

Diagnosis and Management of Vestibular Schwannoma: Focus on Dizziness: Sung Il Nam; Res Vestib Sci. 2021;20(4):119-125. Published online December 15, 2021; DOI: https://doi.org/10.21790/rvs.2021.20.4.119

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1 Crossref

Vestibular schwannoma (VS) is commonly encountered in the cerebellopontine angle and benign neoplasms that arise from Schwann cells of the eighth cranial nerve, which can show not only hearing loss but also various vestibular symptoms. Dizziness is the symptom causing significantly negative effect on quality of life in patients with VS. Here, we will review the dizziness in VS.

Citations

Citations to this article as recorded by

Impairment of Vestibular Function in Patients with Vestibular Schwannoma According to the Presence of Dizziness
Youngjeong Lee, Se A Lee, Eek-Sung Lee, Tae-Kyeong Lee, Jong Dae Lee
Research in Vestibular Science.2022; 21(3): 75. CrossRef

Original Article

Long-Term Results of CyberKnife Radiosurgery for Vestibular Schwannoma: Ho Joong Lee, Chae Dong Yim, Hyun Woo Park, Dong Gu Hur, Ho Jin Jeong, Seong-Ki Ahn; Res Vestib Sci. 2017;16(1):23-28. Published online March 15, 2017; DOI: https://doi.org/10.21790/rvs.2017.16.1.23

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Abstract PDF: Objective: Since the 2000s, CyberKnife radiosurgery (CKRS) is either a primary or an adjunct management approach used to treat patients with vestibular schwannoma (VS). The goals of CKRS are prevention of tumor growth, preservation of cranial nerve function and prevention of new neurologic deficiencies. The aim of this study was to assess the efficacy and safety of CKRS, in terms of tumor control, hearing preservation, and complications.
Methods
Forty patients with VS underwent CKRS as a treatment modality for from January 2010 to February 2016. The long term results of 32 patients were evaluated who received CKRS as primary treatment. 8 patients presented with previously performed surgical resection. Information related to clinical history, Brain MRI and outcomes of patients with VS collected retrospectively by reviewing patient’s chart and telephone survey.
Results
The mean tumor volume was 3.3 cm³ and the mean follow-up was 41 months. The most recent follow-up showed that tumor size decreased in 17 patients (42.5%), displayed no change in 19 patients (47.5%), and increased in 4 patients (10%). Progression-free survival rates after CKRS at 1, 3, and 5 years were 95%, 90%, and 90%. After CKRS, 13 patients experienced hearing degradation. The overall rate of preservation of serviceable hearing at the long-term follow-up was 60%. Vertigo, ataxia, and headache were improved after CKRS compared with pretreated status. But, facial weakness, trigeminal nerve neuropathy, and tinnitus were worsen.
Conclusion
CKRS provide an excellent tumor control rate and a comparable hearing preservation rate in VS patients. Also CKRS is associated with low rate of cranial neuropathy, other complications.

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