RFC1 and cerebellar ataxia: Biallelic pathogenic intronic AAGGG repeat expansions in the RFC1 gene were found to be associated with cerebellar ataxia, neuropathy, vestibular areflexia syndrome (CANVAS) in 2019.1 Since then, several groups have identified biallelic RFC1 repeat expansions in a small number of patients previously diagnosed with immune-mediated neuropathies.2‐4 These findings raise the question of whether patients with inflammatory neuropathies should be screened for RFC1 repeat expansions.