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Encephalopathy caused by SCN2A mutation. SCN2A encodes the major subunit of voltage-gated sodium channels in excitatory neurons. Mutation may be associated with hereditary disease including autosomal dominant epilepsy syndrome and benign familial neonatal infantile seizures. De novo SCN2A mutations have been accepted to cause severe disorders including epileptic encephalopathies, intellectual disability without epilepsy, Ohtahara and West syndrome, epilepsy of infancy with migrating focal seizures (EIMFS).
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