Neurodevelopmental profile of siblings with Angelman syndrome due to pathogenic UBE3A variants.
Anjali SadhwaniJ M WillenH MillerR Barbieri-WelgeL T HorowitzL M NollS PetersR HundleyL M BirdWen-Hann TanPublished in: Journal of intellectual disability research : JIDR (2019)
The presence of an older sibling with the same neurodevelopmental disorder is associated with an earlier age of diagnosis and may be associated with an improvement in expressive language skills; the developmental outcome of siblings with AS due to a UBE3A mutation is otherwise comparable.