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  • Title: Duplication of 8q12 encompassing CHD7 is associated with a distinct phenotype but without duane anomaly.
    Author: Luo H, Xie L, Wang SZ, Chen JL, Huang C, Wang J, Yang JF, Zhang WZ, Yang YF, Tan ZP.
    Journal: Eur J Med Genet; 2012 Nov; 55(11):646-9. PubMed ID: 22902603.
    Abstract:
    Interstitial duplications of 8q12 encompassing CHD7 have recently been described as a new microduplication syndrome. Three 8q12 duplications have been reported with shared recognizable phenotype: Duane anomaly, developmental delay and dysmorphic facial features. We identified a 2.7 Mb duplication on chromosome 8q12 with SNP-array in a patient with growth delay, congenital heart defects, ear anomalies and torticollis. To our knowledge, this is the smallest duplication reported to date. Our findings support the notion that increased copy number of CHD7 may underlie the phenotype of the 8q12 duplication. Our study together with previous studies suggest that the 8q12 duplication could be defined as a novel syndrome.
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