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Neurodevelopmental disorder with impaired language and ataxia and with or without seizures
Neurodevelopmental disorder with impaired language and ataxia and with or without seizures (NEDLAS) is characterized by axial hypotonia and global developmental delay apparent in early infancy. Affected individuals have delayed walking with gait ataxia and poor language development. Behavioral abnormalities also commonly occur. The severity is highly variable: a subset of patients have a more severe phenotype with early-onset seizures resembling epileptic encephalopathy, inability to walk or speak, and hypomyelination on brain imaging (summary by Stolz et al., 2021). [from OMIM]
Congenital horizontal nystagmus
Horizontal nystagmus dating from or present at birth. [from HPO]
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