Angelman syndrome is characterized by severe motor and intellectual retardation, seizures associated with characteristic EEG traces, microcephaly, ataxia, frequent jerky limb movements and flapping of the arms and hands, hypotonia, hyperactivity, hypopigmentation (39%), absence of speech, characteristic face shape, and episodes of paroxysmal laughter. The AS phenotype results from the lack of a maternal contribution at chromosome 15q11-q13.
Also known as
Request a test
When requesting this test please use the referral form provided. Please also refer to any additional information provided for this test.
Download the referral form >
For additional information please click on the link
Great Ormond Street Hospital NE Thames Regional Genetics Service Laboratories
Great Ormond Street Hospital for Children
37 Queen Square
1ml EDTA neonates, 5ml EDTA adults
Disease / group
15q11-q13 (Angelman Syndrome)
Call in advance?
Prenatals must be arranged in advance, through a Clinical Genetics department if possible. Amniotic fluid or CV samples should be sent to Cytogenetics for dissecting and culturing, with instructions to forward the sample to the Regional Molecular Genetics laboratory for analysis