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  • Title: Novel EED mutation in patient with Weaver syndrome.
    Author: Cooney E, Bi W, Schlesinger AE, Vinson S, Potocki L.
    Journal: Am J Med Genet A; 2017 Feb; 173(2):541-545. PubMed ID: 27868325.
    Abstract:
    Weaver syndrome is a rare condition characterized by overgrowth, macrocephaly, accelerated osseous maturation, variable intellectual disability, and characteristic facial features. Pathogenic variants in EZH2, a histone methyltransferase, have previously been identified as a cause of Weaver syndrome. However, the underlying molecular cause in many patients remains unknown. We report a patient with a clinical diagnosis of Weaver syndrome whose exome was initially non-diagnostic. Reports in the medical literature of EED associated overgrowth prompted re-analysis of the patient's original exome data. The patient was found to have a likely pathogenic variant in EED. These findings support that Weaver syndrome is a disorder with locus heterogeneity and can be due to pathogenic variants in either EZH2 or EED. This case highlights the utility of exome sequencing as a clinical diagnostic tool for novel gene discovery as well as the importance of re-examination of exome data as new information about gene-disease associations becomes available. © 2016 Wiley Periodicals, Inc.
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