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Case Reports
. 2022 Feb 18:2022:4918785.
doi: 10.1155/2022/4918785. eCollection 2022.

Ipsilateral Vestibular Schwannoma after Cochlear Implantation

S Tüpker  1 , N Ay  1 , L U Scholtz  1 , H B Gehl  2 , V F Mautner  3 , P Goon  1 , H Sudhoff  1 , I Todt  1
Affiliations
Case Reports

Ipsilateral Vestibular Schwannoma after Cochlear Implantation

S Tüpker et al. Case Rep Otolaryngol. .

Abstract

Objective: The vestibular schwannoma incidence rate is approximately 4.2 per 100,000/year. Thus far, about 700,000 cochlear implantations have been performed worldwide; therefore, the occurrence of vestibular schwannoma postcochlear implantations can be assumed to be infrequent. Recent developments allow safe observation and surveillance of the implanted-side internal auditory canal (IAC) and cochlea by magnetic resonance imaging (MRI), even after cochlear implantation. Patients. A 71-year-old woman with sudden hearing loss and a contralateral vestibular schwannoma without clinical and genetic signs of neurofibromatosis type II. Intervention(s). Ipsilateral cochlear implantation and contralateral vestibular schwannoma extirpation with regular tumor follow-up. Main Outcome Measure(s). Comparison of ipsilateral pre and postcochlear implantation 3T MRI T1 GAD.

Results: We observed a tumor growing at the fundus of the internal auditory canal 1 year after cochlear implantation on the ipsilateral side. Although first detected after cochlear implantation beside a known vestibular schwannoma on the contralateral side, a scan slice thickness of 2 mm cannot fully exclude the preoperative persistence of a small tumor. Based on the clinical findings and after genetic exclusion of NFII, the patient was classified as a NFII mosaic type.

Conclusion: Even after cochlear implantation, tumors in the IAC causing vertigo, facial palsy, and affecting the audiologic outcome can be detected by MRI. The MRI slice thickness used before cochlear implantation should be under 2 mm.

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Conflict of interest statement

The authors declare that they have no conflicts of interest.

Figures

Figure 1
Figure 1
PTA of the right side 2014.
Figure 2
Figure 2
PTA of the right side after sudden hearing loss 2018.
Figure 3
Figure 3
Coronal T1 MRI GAD of cerebellopontine angle before cochlear implantation of the right ear.
Figure 4
Figure 4
Coronal T1 MRI GAD of cerebellopontine angle 2 years after cochlear implantation of the right ear.
Figure 5
Figure 5
Coronal overview T1 MRI GAD of cerebellopontine angle 2 years after cochlear implantation of the right ear.
Figure 6
Figure 6
Coronal overview T1 MRI GAD of cerebellopontine angle 2 years after cochlear implantation of the right ear with slices behind the cochlea indicating local artifact size.
See this image and copyright information in PMC

References

    1. Marinelli J. P., Lohse C. M., Carlson M. L. Incidence of vestibular schwannoma over the past half-century: a population-based study of Olmsted County, Minnesota. Otolaryngology-Head and Neck Surgery . 2018;159(4):717–723. doi: 10.1177/0194599818770629. - DOI - PMC - PubMed
    1. Kshettry V. R., Hsieh J. K., Ostrom Q. T., Kruchko C., Barnholtz-Sloan J. S. Incidence of vestibular schwannomas in the United States. Journal of Neuro-Oncology . 2015;124(2):223–228. doi: 10.1007/s11060-015-1827-9. - DOI - PubMed
    1. Yigit O., Kalaycik Ertugay C., Yasak A. G., Araz Server E. Which imaging modality in cochlear implant candidates? European Archives of Oto-Rhino-Laryngology . 2019;276(5):1307–1311. doi: 10.1007/s00405-019-05349-0. - DOI - PubMed
    1. Tamplen M., Schwalje A., Lustig L., Alemi A. S., Miller M. E. Utility of preoperative computed tomography and magnetic resonance imaging in adult and pediatric cochlear implant candidates. The Laryngoscope . 2016;126(6):1440–1445. doi: 10.1002/lary.25659. - DOI - PubMed
    1. Sudhoff H., Gehl H. B., Scholtz L. U., Todt I. MRI observation after intralabyrinthine and vestibular schwannoma resection and cochlear implantation. Frontiers in Neurology . 2020;11:p. 759. doi: 10.3389/fneur.2020.00759. - DOI - PMC - PubMed

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