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DOI: 10.1055/s-0040-1711098
Cochlear Implantation in Patients with intrameatal or intracochlear Schwannoma of the Vestibularcochlear nerve
Background Up to 98% of patients with schwannoma of the 8th cranial nerve suffer from hearing loss at the time of diagnosis, or experience further hearing loss during treatment. CROS-Hearing aids cannot restore binaural hearing, which is often desired by the patients. This case series evaluates the audiological outcome of cochlear implantation after removal of intracochlear or intrameatal schwannoma of the vestibulocochlear nerve.
Methods Within our group of 12 patients, 5 underwent cochlear implantation sequentially after tumor removal (3/5 retrosigmoidal, 1/5 middle-fossa approach) or radiotherapy (2/5). In 7 cases simultaneous transcochlear/ translabyrithine tumor removal and CI was performed. Intraoperative ECAP and/or E-ABR measurements were used to monitor nerve function.
Results Only 2 patients did not regain usable hearing and were explanted later. Freiburg number recognition varied between 50-100% (mean 91,1%), monosyllabic word recognition between 0-90% (mean 45,3%). Four subjects with severe preoperative tinnitus additionally reported significant tinnitus reduction after surgery.
Conclusion Cochlear implantation can be a viable option for hearing rehabilitation in patients suffering from vestibular schwannoma.
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Publication History
Article published online:
10 June 2020
© 2020. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).
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