NCIt synonyms : Hypomyelination with Atrophy of Basal Ganglia and Cerebellum; HLD6; HABC;
NCIt definition : A genetic disorder of infancy or early childhood caused by mutation(s) in the TUBB4A
gene, encoding the tubulin beta-4A chain. It is characterized by hypomyelination or
atrophy of the cerebellum and or putamen leading to delayed motor development, gait
instability, and extrapyramidal movement disorders.;