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  • Title: A case of mild CHARGE syndrome associated with a splice site mutation in CHD7.
    Author: Wells C, Loundon N, Garabedian N, Wiener-Vacher S, Cordier-Bouvier MD, Goudeffroye G, Attié-Bitach T, Marlin S.
    Journal: Eur J Med Genet; 2016 Apr; 59(4):195-7. PubMed ID: 26921530.
    Abstract:
    CHARGE syndrome (MIM#214800) (Coloboma, Heart defect, Atresia of choanae, Retarded growth and development, Genital hypoplasia, Ear abnormalities/deafness) is caused by heterozygous mutation of CHD7 transmitted in an autosomal dominant manner. In this report, we describe a patient with bilateral hearing impairment, unusually-shaped ears, no intellectual disability and a patent ductus arteriosus. Further investigation showed abnormal semicircular canals and the presence of olfactory bulbs. He does not fulfill the Blake or the Verloes criteria for CHARGE. A de novo mutation at the donor splice site of intron 33 was identified (c.7164 + 1G > A). It is of importance to diagnose mildly affected patients for appropriate genetic counselling and to better understand the mild end of the phenotypic spectrum of CHARGE syndrome.
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