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An autosomal recessive disorder characterized by neuroregression and loss of motor, language and cognitive skills, after a normal early development. Disease onset is between 12 and 18 month of age. Patients show poor overall growth, microcephaly, feeding difficulties and spastic quadriplegia. Some patients may have seizures. Death in childhood may occur. Hypomyelinating leukodystrophy with subcortical and periventricular white matter abnormalities is seen on brain imaging.






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