Enlarged vestibular aqueduct: Audiological and genetical features in children and adolescents
Instytucja
Instytut Fizjologii i Patologii Słuchu
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
International Journal of Pediatric Otorhinolaryngology (25pkt w roku publikacji)
ISSN
0165-5876
EISSN
Wydawca
ELSEVIER IRELAND LTD
DOI
URL
Rok publikacji
2017
Numer zeszytu
Strony od-do
254-258
Numer tomu
101
Identyfikator DOI
Liczba arkuszy
Autorzy
(liczba autorów: 6)
Pozostali autorzy
+ 5
Słowa kluczowe
angielski
Enlarged vestibular aqueduct
EVA
Hearing loss
SLC26A4 gene mutation
Streszczenia
Język
angielski
Treść
Background Enlarged Vestibular Aqueduct (EVA) is one of the most common congenital malformations associated with sensorineural or mixed hearing loss. The association between hearing loss and EVA is described in syndromic (i.e. Pendred Syndrome, BOR, Waardenburg) and non-syndromic disorders, as isolate or familiar mutations of the SLC26A4 gene. The audiological phenotype of the EVA syndrome is heterogeneous, the type and entity of hearing loss may vary and vertigo episodes might also be present. Objective The aim of this retrospective study was to describe the clinical and genetic features of a group of adolescent subjects presenting an EVA clinical profile, considering the presence of SLC26A4 gene mutations. Methods 14 Caucasian patients were assessed (24 ears in total; 4 patients presented a monolateral EVA), 10 females and 4 males. Their age at the time of diagnosis was between 1 and 6 years (mean age 2.5 years). Subjects were assessed by an ENT microscopy evaluation with a complete audiometric assessment, CT & MRI scans and genetic tests for the evaluation of the pendrin gene mutations (SLC26A4). Results Considering the presence of SLC26A4 mutations and thyroid function, we could identify three sub-groups of patients: group 1, non syndromic EVA (ns EVA, no SLC26A4 mutation and no thyroid dysfunction); group 2, EVA with DFNB4 (single SLC26A4 gene mutation and no thyroid dysfunction); group 3, EVA with Pendred Syndrome (two pathological mutation of SLC26A4 and thyromegaly with thyroid dysfunction). Patients of group 1 (ns-EVA) showed various degrees of hearing loss from mild (55%) to severe-profound (45%). In groups 2 (DFNB4) and 3 (PDS), the degree of hearing loss is severe to profound in 70–75% of the cases; middle and high frequencies are mainly involved. Conclusions The phenotypic expressions associated with the EVA clinical profile are heterogeneous. From the available data, it was not possible to identify a representative audiological profile, in any of the three sub-groups. The data suggest that: (i) a later onset of hearing loss is usually related to EVA, in absence of SLC26A4 gene mutations; and (ii) hearing loss is more severe in patients with SLC26A4 gene mutations (groups 2 and 3 of this study).
Inne
System-identifier
PX-5a819b1fd5defc5e83d5fdda
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