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Int Arch Otorhinolaryngol 2014; 18(01): 068-076
DOI: 10.1055/s-0033-1358659
Review Article
Thieme Publicações Ltda Rio de Janeiro, Brazil

Anatomical Changes and Audiological Profile in Branchio-oto-renal Syndrome: A Literature Review

Tâmara Andrade Lindau
1   Department of Speech Pathology, Universidade Estadual Paulista - UNESP, Marília, São Paulo, Brazil
,
Ana Cláudia Vieira Cardoso
1   Department of Speech Pathology, Universidade Estadual Paulista - UNESP, Marília, São Paulo, Brazil
,
Natalia Freitas Rossi
1   Department of Speech Pathology, Universidade Estadual Paulista - UNESP, Marília, São Paulo, Brazil
,
Célia Maria Giacheti
1   Department of Speech Pathology, Universidade Estadual Paulista - UNESP, Marília, São Paulo, Brazil
› Author Affiliations
Further Information

Publication History

27 August 2013

04 September 2013

Publication Date:
05 November 2013 (online)

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Abstract

Introduction Branchio-oto-renal (BOR) syndrome is an autosomal-dominant genetic condition with high penetrance and variable expressivity, with an estimated prevalence of 1 in 40,000. Approximately 40% of the patients with the syndrome have mutations in the gene EYA1, located at chromosomal region 8q13.3, and 5% have mutations in the gene SIX5 in chromosome region 19q13. The phenotype of this syndrome is characterized by preauricular fistulas; structural malformations of the external, middle, and inner ears; branchial fistulas; renal disorders; cleft palate; and variable type and degree of hearing loss.

Aim Hearing loss is part of BOR syndrome phenotype. The aim of this study was to present a literature review on the anatomical aspects and audiological profile of BOR syndrome.

Data Synthesis Thirty-four studies were selected for analysis. Some aspects when specifying the phenotype of BOR syndrome are controversial, especially those issues related to the audiological profile in which there was variability on auditory standard, hearing loss progression, and type and degree of the hearing loss. Mixed loss was the most common type of hearing loss among the studies; however, there was no consensus among studies regarding the degree of the hearing loss.

Keywords

branchio-oto-renal syndrome - BOR syndrome - hearing - review
 

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