Examinamos as características da síndrome de Pendred em 41 indivíduos pertencentes a uma família nordestina com elevado grau de endogamia. A nova . 19 Oct Pendred syndrome/nonsyndromic enlarged vestibular aqueduct (PDS/NSEVA) comprises a phenotypic spectrum of sensorineural hearing loss. 6 Mar Pendred syndrome is a genetic disorder that causes early hearing loss in children. It also can affect the thyroid gland and sometimes creates.

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Epub Nov 5. Mutations of the PDS gene, encoding pendrin, are associated sijdrome protein mislocalization and loss of iodide efflux: Congenital endocrine disorders Q In this study, we report the clinical and molecular characteristics of a large consanguineous Brazilian family harboring a mutation in the SLC26A4 gene, from which six affected penrded presented with subtle phenotypic variations.

Pendred syndrome is caused by mutations in a putative sulphate transporter gene PDS.

A common SLC26A4-linked haplotype underlying non-syndromic hearing loss with enlargement of the vestibular aqueduct. The proband was a year-old deaf Brazilian woman who presented a bulky multinodular goiter and hypothyroidism since puberty. However, they did find significant linkage to the DFNB4 penrded located on 7q At-risk relatives should be evaluated for hearing loss, vestibular dysfunction, and thyroid abnormality in the same manner as an affected individual at initial diagnosis see Evaluations Following Initial Diagnosis.

Pendred syndrome is caused by mutations in a putative sulphate transporter gene PDS. Eur J Endocrinol ; A single nucleotide T deletion at position of exon 10 delT was detected in homozygous state in the six deaf siblings Figure 3.

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Hum Genet ; Imaging studies from the inner ear were obtained with the use of computed tomography CT and magnetic resonance imaging MRI of the temporal bones. Many persons with NSEVA are born with normal hearing and progressively become hearing impaired during childhood.

Because of progressive thyroid enlargement and compressive symptoms, she underwent a total thyroidectomy at the age of To date, more than mutations spanning the whole coding region of the SLC26A4 gene have been shown to be associated with PS, although the genotype-phenotype correlations are still poor and remain unexplained. Clinical characterization of the six siblings with PS. Barra II ; Paula P. We need long-term secure funding to provide you the information that you need at your fingertips.

Ann Otol Rhinol Laryngol.

Summary Epidemiology PDS is one of the most frequent forms of syndromic genetic deafness. Identification of a mutation in coding sequence of the human thyroid peroxidase gene causing congenital goiter. Pendrin, encoded by the Pendred syndrome gene, resides in the apical penndred of renal intercalated cells and mediates bicarbonate secretion.

The father carried a de novo balanced translocation between 8q and 10p: Mol Endocrinol ;8: Subjects IV-6 and IV had undergone partial thyroidectomy and were taking levothyroxine at the time of the evaluation for this study.

Pendred syndrome goitre and sensorineural hearing loss maps to chromosome 7 in the region containing the nonsyndromic deafness gene DFNB4. PDS follows an autosomal recessive pattern of inheritance. Hearing loss associated with enlarged vestibular aqueduct and zero or one mutant allele of SLC26A4. Van Wouwe et al.


The functions of pendrin in the kidneys are less well understood. Forkhead box protein I1. Penvred decades of screening for congenital hypothyroidism in the Netherlands: InfancyNeonatal ICD Molecular analysis of the Pendred’s syndrome gene and magnetic resonance imaging studies of the inner ear are essential for the diagnosis of true pendred’s syndrome.

Sequence analysis detects variants that are benign, likely benign, of uncertain significancelikely pathogenic, or pathogenic. Unfortunately, it is not free to produce. The hearing loss is associated with inner ear abnormalities, which can be readily identified with appropriate imaging procedures, ranging from an isolated enlarged vestibular aqueduct EVA to a typical cochlear malformation known as Mondini dysplasia.

American College of Medical Genetics. Other search option s Alphabetical list.


Differences in perspective may exist among medical professionals and within families regarding the use of prenatal testing, particularly if the testing is being considered for the purpose of pregnancy termination rather than early diagnosis. More detailed information for clinicians ordering genetic tests can be found here.

For a more complete discussion of the molecular genetics of Pendred syndrome, see the entry for the SLC26A4 gene Parents of a proband.