RFC1 and Friedreich ataxia: Regarding cerebellar features, BVP is increasingly identified as an extracerebellar feature of the many cerebellar ataxias, including the most common sporadic and inherited diseases such as idiopathic late-onset cerebellar ataxia (ILOCA), idiopathic Cerebellar Ataxia with Bilateral Vestibulopathy (iCABV), spinocerebellar ataxia (SCA) 3 and 6, Friedreich ataxia (FRDA), Cerebellar Ataxia, Neuronopathy, Vestibular Areflexia syndrome (CANVAS)/RFC1-related disease, and most recently SCA27B (FGF14 GAA expansion) (23, 61, 72–76).