| Syndrome with characteristics of slowly progressive spasticity, extrapyramidal movement disorders (dystonia, choreoathetosis and rigidity), cerebellar ataxia, moderate to severe cognitive deficit, and anarthria/dysarthria. So far, around 20 cases have been reported in the literature. The syndrome affects both males and females and onset occurs in infancy or early childhood. Caused by mutation in the TUBB4A gene on chromosome 19p13. |