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Atypical Presentation of Enlarged Vestibular Aqueducts Caused by SLC26A4 Variants

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Author(s)
Jun Chul ByunKyu-Yup LeeSu-Kyeong Hwang
Keimyung Author(s)
Byun, Jun Chul
Department
Dept. of Pediatrics (소아청소년학)
Journal Title
Children (Basel)
Issued Date
2022
Volume
9
Issue
2
Keyword
Horner syndromeptosisanisocoriadeafnessvestibular aqueductpendrinSLC26A4
Abstract
Enlarged vestibular aqueduct is the most common inner ear malformation in pediatric patients with sensorineural hearing loss. Here, we report a new presentation of enlarged vestibular aqueduct in a Korean family. The family consists of two parents and five daughters, and the first and second daughters were diagnosed with bilateral enlarged vestibular aqueducts. The third daughter, who showed no signs of hearing deterioration, came to medical attention with incomplete Horner syndrome. Evaluations for localization of Horner syndrome on the patient and Sanger sequencing of SLC26A4 on the family members were performed. Although auditory brainstem response and pure tone audiometry of the third daughter were normal, temporal bone computed tomography demonstrated bilateral enlarged vestibular aqueducts. Sanger sequencing of SLC26A4 revealed compound heterozygous variants c.2168A>G and c.919-2A>G in the first, second, and third daughters. Diagnosis of enlarged vestibular aqueduct is often delayed because the degree of hearing loss can vary, and a considerable phenotypic variability can be shown even in family members with the same SLC26A4 variations. Fluctuations of CSF pressure into the cochlear duct and recurrent microruptures of the endolymphatic membrane could result in damage of sympathetic nerve supplying to the inner ear, which could explain the mechanism of Horner syndrome associated with enlarged vestibular aqueduct.
Keimyung Author(s)(Kor)
변준철
Publisher
School of Medicine (의과대학)
Citation
Jun Chul Byun et al. (2022). Atypical Presentation of Enlarged Vestibular Aqueducts Caused by SLC26A4 Variants. Children (Basel), 9(2), 165. doi: 10.3390/children9020165
Type
Article
ISSN
2227-9067
Source
https://www.mdpi.com/2227-9067/9/2/165
DOI
10.3390/children9020165
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/44178
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Pediatrics (소아청소년학)
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