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Asymptomatic superior semicircular canal dehiscence

Published online by Cambridge University Press:  27 October 2021

L Verrecchia ,
K Edholm  and
M Pekkari
L Verrecchia*
Affiliation:
ENT Unit, Department of Clinical Science, Intervention and Technology – CLINTEC, Karolinska Institutet, Solna ENT Department, Audiology and Neurotology Section, Karolinska University Hospital, Huddinge, Sweden
K Edholm
Affiliation:
Department of Neuroradiology, Karolinska University Hospital, Huddinge, Sweden
M Pekkari
Affiliation:
ENT Unit, Department of Clinical Science, Intervention and Technology – CLINTEC, Karolinska Institutet, Solna ENT Department, Audiology and Neurotology Section, Karolinska University Hospital, Huddinge, Sweden
*
Author for correspondence: Dr Luca Verrecchia, ENT Unit, Department of Clinical Science, Intervention and Technology – CLINTEC, Karolinska Institutet, Karolinska University Hospital, B61, 14186Huddinge, Sweden E-mail: luca.verrecchia@ki.se Fax: +46 85 858 7353
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Abstract

Objective

To describe a case of asymptomatic superior semicircular canal dehiscence.

Method

Clinical case report.

Results

A 50-year-old man presenting with right-sided Ménière´s disease also showed an enhanced response on vestibular evoked myogenic potential testing for the left ear. Unilateral left-sided superior semicircular canal bone dehiscence was clearly visualised on a subsequent temporal bone computed tomography scan. These findings were consistent with superior canal dehiscence syndrome. However, the patient did not complain of any specific superior canal dehiscence syndrome symptoms. Given that vestibular evoked myogenic potential testing may detect asymptomatic forms of superior canal dehiscence, as noted in this case, such testing seems to exhibit reduced specificity for superior canal dehiscence syndrome.

Conclusion

An enhanced response on vestibular evoked myogenic potential testing in isolation appears to be a weaker indicator of superior canal dehiscence syndrome, and rather a marker of superior semicircular canal dehiscence.

Keywords

Vestibular Evoked Myogenic PotentialsCervical Vestibular Evoked Myogenic PotentialsOcular Vestibular Evoked Myogenic PotentialsSuperior Semicircular Canal DehiscenceSemicircular Canal Dehiscence Syndrome
Type
Clinical Records
Information
The Journal of Laryngology & Otology , Volume 136 , Issue 1 , January 2022 , pp. 87 - 90
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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Footnotes

Dr L Verrecchia takes responsibility for the integrity of the content of the paper

References

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