[RFC1 Gene: Function and Intronic Repeat Expansion Causing Cerebellar Ataxia With Neuropathy and Vestibular Areflexia Syndrome].

Biallelic intronic repeat expansion in the RFC1 gene was reported as a cause of cerebellar ataxia with neuropathy and vestibular areflexia syndrome (CANVAS). Its clinical features include late-onset cerebellar ataxia, sensory neuropathy (or neuronopathy), bilateral vestibular impairment, autonomic dysfunction, chronic cough, pyramidal sign, or parkinsonism. Repeat conformations heterogeneity is observed along with the possible phenotype-genotype correlation while its molecular pathogenesis remains uncovered.