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A disorder of the nervous system white matter and myelin resulting in hypomyelination and in some cases also demyelination. There are different combinations of signs and symptoms of the disease, at the most severe end of the spectrum is hypomyelination with atrophy of the basal ganglia and cerebellum (H-ABC). At the mildest end is isolated hypomyelination. The features in other individuals with TUBB4A-related leukodystrophy fall in between these two extremes. The disease is caused by mutations in the TUBB4A gene, which provides instructions for making a protein called beta-tubulin. Inherited in an autosomal dominant pattern however most cases are the result of de novo mutations in the gene.
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