What causes angelman syndrome?

Because..: Most likely due to physical features and some developmental issues.These kids often have some delays.It is a genetic condition due to a defect in the child's chromosomes.

Gene disorder: It is caused by a lack of duplication of mothers gene on chromosome 15 two genes may be involved. Ube3a or oca2.

Dx 90% lab, 10% PE: A clinical geneticist can make a diagnosis by observing the combination of unusual behavioral features and severe developmental delay, usually by 2 years of age. 90% confirmed by convoluted genetic testing, 10% by clinical presentation alone. Treatment includes the full range of therapies for developmental delay, especially speech therapy initially concentrating on nonverbal communication.