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Williams syndrome

ORPHA:904· ICD-10 Q93.8

Definition

A rare genetic multisystemic neurodevelopmental disorder characterized by a distinct facial appearance, cardiac anomalies (most frequently supravalvular aortic stenosis), cognitive and developmental abnormalities, and connective tissue abnormalities (e.g., joint laxity). Facial dysmorphism is characterized by a broad forehead, bitemporal narrowing, periorbital fullness, stellate and/or lacy iris pattern, short upturned nose with bulbous tip, long philtrum, wide mouth, full lips and mild micrognathia.

Prevalence
1-5 / 10 000
Inheritance
Autosomal dominant
Age of onset
Antenatal, Neonatal