Williams syndrome is caused by a gene deletion of chromosome 7. A majority of the cases are sporadic with typical facial appearance, cardiac anomalies, and mental retardation. We report a rare case of Williams syndrome associated with supravalvular aortic stenosis, subvalvular aortic membrane, mitral regurgitation, aortic coarctation, and patent ductus arteriosus. The patient had undergone a single-stage surgical repair with satisfactory results at 5 months of follow-up.
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