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| Common features of Williams Syndrome. |
- Characteristic facial appearance
(including prominent lips, open mouth, long philtrum (midline of upper lip from lip margin to nose), missing teeth hypoplastic tooth enamel, low nasal bridge and epicanthal folds. Most Williams sufferers have similar facial features.
- Heart problems (supravalvular aortic stenosis)
- Blood vessel problems
- High blood pressure
- Hypercalcemia (elevated blood calcium levels, usually during infancy)
- Low birth-weight / low weight gain
- Feeding problems
- Irritability (colic during infancy)
- Dental abnormalities
- Kidney abnormalities
- Hernias
- Hyperacusis (sensitive hearing)
- Musculoskeletal problems
- Overly friendly (excessively social) personality
- Developmental delay, learning disabilities and attention deficit
- Mental retardation
- Inward bend of little finger (clinodactyly)
- Inward bend of great toe
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