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An autosomal dominant disorder characterized by delayed motor and speech development, developmental regression, congenital heart defects, limb and digital anomalies, and dysmorphic features. Cardiac features include pulmonary stenosis, patent ductus arteriosus, aortic coarctation, valvular defects, hypoplastic left heart, double outlet right ventricle, and conduction abnormalities. Dysmorphic facial features include multiple hair whorls or hairline abnormalities, ptosis, epicanthal folds, and low-set or dysplastic ears.




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