Cardiovascular and genitourinary anomalies in patients with duplications within the Williams syndrome critical region: phenotypic expansion and review of the literature.

Abstract excerpt

Williams syndrome results from a microdeletion of approximately 1.5 Mb of chromosome 7q11.23. Several patients have been reported with the reciprocal microduplication in association with a variety of phenotypic features including cognitive impairment and typical facial features, though only a few have had birth defects. We report on three probands with duplications within 7q11.23 of variable sizes; two with...

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