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Facial and dental appearance of Williams syndrome

Williams syndrome is a genetic condition, which predominantly occurs as a sporadic disorder, although some families have been reported showing autosomal dominant inheritance with varying penetrance. The incidence of Williams syndrome is estimated to be one in 20 000–50 000 live births, and it consists of supravalvular aortic stenosis, characteristic dysmorphic facial features named “elfin face” (wide mouth with long phyltrum and …