Spastic ataxia-8 with hypomyelinating leukodystrophy is an autosomal recessive progressive neurodegenerative disorder characterized by onset of primarily motor dysfunction within the first year of life. Affected individuals initially have hypotonia and later develop ataxia, spasticity, and a pyramidal syndrome with weakness and loss of ambulation. Other features may include dystonia, dysarthria, and abnormal eye movements. Brain imaging shows cerebellar atrophy and hypomyelinating leukodystrophy. [From OMIM]
