Waardenburg syndrome ( WS )
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چکیده
Note Waardenburg syndrome (WS) is a hereditary auditorypigmentary syndrome, the major symptoms being congenital sensorineural hearing loss and pigmentary disturbance of eyes, hair and skin. Depending in additional symptoms, WS can be classified into four types: WS type I (WS1) is associated with facial deformity such as dystopia canthorum (lateral displacement of the inner canthi); WS2 has no other symptoms; WS3 is associated with upper limb deformity; and WS4, with megacolon.
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گزارش یک مورد سندروم واردنبرگنوع دو (گزارش مورد)
Waardenburg syndrome (WS) is a rare disease characterized by sensor neural deafness in association with pigmentary anomalies and defects of neural-crest-derived tissues. WS is caused by mutations in the microphthalmia-associated with transcription factor gene. This case is a 10 month old infant girl in which during a routine physical examination found that she has hetetrochromia and unilate...
متن کاملA Comprehensive Genetic and Clinical Evaluation of Waardenburg Syndrome Type II in a Set of Iranian Patients
Waardenburg syndrome (WS) is a neurocristopathy with an autosomal dominant mode of inheritance, and considerable clinical and genetic heterogeneity. WS type II is the most common type of WS in many populations presenting with sensorineural hearing impairment, heterochromia iridis, hypoplastic blue eye, and pigmentary abnormalities of the hair and skin. To date, mutations of MITF, SOX10, and SNA...
متن کاملMolecular Study of Three Lebanese and Syrian Patients with Waardenburg Syndrome and Report of Novel Mutations in the EDNRB and MITF Genes.
Waardenburg syndrome (WS) is a genetic disorder characterized primarily by depigmentation of the skin and hair, heterochromia of the irides, sensorineural deafness, and sometimes by dystopia canthorum, and Hirschsprung disease. WS presents a large clinical and genetic heterogeneity. Four different types have been individualized and linked to 5 different genes. We report 2 cases of WS type II an...
متن کاملSyndrome of the month Waardenburg syndrome
Auditory-pigmentary syndromes are caused by physical absence of melanocytes from the skin, hair, eyes, or the stria vascularis of the cochlea. Dominantly inherited examples with patchy depigmentation are usually labelled Waardenburg syndrome (WS). Type I WS, characterised by dystopia canthorum, is caused by loss offunction mutations in the PAX3 gene. Type III WS (KleinWaardenburg syndrome, with...
متن کاملThe incidence of deafness is non-randomly distributed among families segregating for Waardenburg syndrome type 1 (WS1).
Waardenburg syndrome (WS) is caused by autosomal dominant mutations, and is characterised by pigmentary anomalies and various defects of neural crest derived tissues. It accounts for over 2% of congenital deafness. WS shows high variability in expressivity within families and differences in penetrance of clinical traits between families. While mutations in the gene PAX3 seem to be responsible f...
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