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An autosomal dominant neurodevelopmental disorder with onset in infancy, and characterized by global developmental delay, intellectual disability, ambulation deficits, severe language impairment, and minor dysmorphic features including a wide mouth, diastema, and bulbous nose. Additional manifestations are spasticity, hypotonia and autistic features including stereotypies. Brain imaging show thin corpus callosum, generalized atrophy, and mild periventricular gliosis.




Mental retardation


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