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Sporadic and NF2-associated vestibular schwannoma surgery and simultaneous cochlear implantation: a comparative systematic review

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Abstract

Purpose

Cochlear implantation (CI) in patients with sensorineural hearing loss caused by a vestibular schwannoma (VS) represents a unique subtype of hearing rehabilitation, as the outcome may be compromised by vestibulocochlear nerve injury as part of the natural VS history or due to iatrogenic trauma induced by surgical tumor removal. This paper aims to review and report contemporary knowledge and practice regarding feasibility and outcomes of simultaneous vestibular schwannoma resection and cochlear implantation to serve as a reference and guide for future surgery and studies.

Methods

The current literature was searched systematically according to the PRISMA guidelines and after criteria-based selection, 29 studies were identified, including a total of 86 patients who had undergone surgical resection of a vestibular schwannoma and subsequent cochlear implantation in a single procedure.

Results

The postoperative outcomes were reported with a high degree of heterogeneity, hindering a proper meta-analysis. However, pooling those cases with reported speech discrimination outcomes demonstrated mean scores equivalent to moderate-to-high performance. A few cases had no audibility. A positive cochlear nerve test result was not a secure positive predictor of success. Complications were rare.

Conclusion

NF2-associated and sporadic VS had good and comparable postoperative outcomes despite significant differences in tumor size, location and surgical approach.

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Authors and Affiliations

  1. Department of Otorhinolaryngology Head and Neck Surgery and Audiology, Rigshospitalet, University Hospital of Copenhagen, Blegdamsvej 9, 2100, Copenhagen, Denmark

    Niels West, Hjalte Sass & Per Cayé-Thomasen

  2. Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark

    Niels West, Hjalte Sass & Per Cayé-Thomasen

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  1. Niels West
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Correspondence to Niels West.

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West, N., Sass, H. & Cayé-Thomasen, P. Sporadic and NF2-associated vestibular schwannoma surgery and simultaneous cochlear implantation: a comparative systematic review. Eur Arch Otorhinolaryngol 277, 333–342 (2020). https://doi.org/10.1007/s00405-019-05741-w

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