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An autosomal dominant neurodevelopmental disorder characterized by mild to severe intellectual disability, psychomotor developmental delay, speech delay, and behavioral manifestations including attention deficit-hyperactivity disorder, autism and anxiety disorders. Most patients have variable additional features, including feeding and gastrointestinal difficulties, high pain threshold, hypersensitivity to sound, hypotonia, broad-based gait, and dysmorphic features, including mild facial abnormalities, strabismus, and small hands and feet.




Mental retardation
Autism spectrum disorder