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An autosomal recessive neurodevelopmental disorder characterized by global developmental delay, moderate to severe intellectual disability, spastic paraparesis, ataxia, and/or peripheral neuropathy. Patients also exhibit dysmorphic features and congenital microcephaly. Most affected individuals develop progressive hypertrophic cardiomyopathy in childhood or have cardiac developmental anomalies. Brain imaging shows corpus callosum abnormalities in all patients, and perisylvian polymicrogyria-like pattern in some individuals.




Mental retardation


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