Purpose: Cornelia de Lange syndrome (CdLS) is a multisystem congenital anomaly disorder characterized by mental retardation, limb abnormalities, distinctive facial features, and hirsutism. Mutations in three genes involved in sister chromatid cohesion, NIPBL, SMC1A, and SMC3, account for ~55% of CdLS cases. The molecular etiology of a significant fraction of CdLS cases remains unknown.
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