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Cochlear nerve canal stenosis and associated semicircular canal abnormalities in paediatric sensorineural hearing loss: a single centre study

Published online by Cambridge University Press:  27 July 2020

Z Zainol Abidin ,
F Mohd Zaki ,
T Y Kew ,
B S Goh  and
A Abdullah
Z Zainol Abidin
Affiliation:
Department of Radiology, Universiti Kebangsaan Malaysia Medical Center, Kuala Lumpur, Malaysia
F Mohd Zaki*
Affiliation:
Department of Radiology, Universiti Kebangsaan Malaysia Medical Center, Kuala Lumpur, Malaysia
T Y Kew
Affiliation:
Department of Radiology, Universiti Kebangsaan Malaysia Medical Center, Kuala Lumpur, Malaysia
B S Goh
Affiliation:
Department of Otorhinolaryngology, Universiti Kebangsaan Malaysia Medical Center, Kuala Lumpur, Malaysia
A Abdullah
Affiliation:
Department of Otorhinolaryngology, Universiti Kebangsaan Malaysia Medical Center, Kuala Lumpur, Malaysia
*
Author for correspondence: Dr Faizah Mohd Zaki, Department of Radiology, Universiti Kebangsaan Malaysia Medical Centre, 56000 Cheras, Kuala Lumpur, Malaysia E-mail: zakhirati@gmail.com Fax: +60 391 456 640
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Abstract

Objective

This study aimed to evaluate the association between cochlear nerve canal dimensions and semicircular canal abnormalities and to determine the distribution of bony labyrinth anomalies in patients with cochlear nerve canal stenosis.

Method

This was a retrospective study in which high-resolution computed tomography images of paediatric patients with severe-to-profound sensorineural hearing loss were reviewed. A cochlear nerve canal diameter of 1.5 mm or less in the axial plane was classified as stenotic. Semicircular canals and other bony labyrinth morphology and abnormality were evaluated.

Results

Cochlear nerve canal stenosis was detected in 65 out of 265 ears (24 per cent). Of the 65 ears, 17 ears had abnormal semicircular canals (26 per cent). Significant correlation was demonstrated between cochlear nerve canal stenosis and semicircular canal abnormalities (p < 0.01). Incomplete partition type II was the most common accompanying abnormality of cochlear nerve canal stenosis (15 out of 65, 23 per cent).

Conclusion

Cochlear nerve canal stenosis is statistically associated with semicircular canal abnormalities. Whenever a cochlear nerve canal stenosis is present in a patient with sensorineural hearing loss, the semicircular canal should be scrutinised for presence of abnormalities.

Keywords

TomographyTemporal BoneHearing Loss, SensorineuralCochleaStenosisSemicircular Canals
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 134 , Issue 7 , July 2020 , pp. 603 - 609
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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Footnotes

Dr Z Zainol Abidin takes responsibility for the integrity of the content of the paper

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