DNMT1 and autosomal dominant cerebellar ataxia: Mutations in DNMT1 have been identified in hereditary sensory and autonomic neuropathy type 1 (HSAN1) syndrome, with other neuropathies and autosomal dominant cerebellar ataxia, deafness, and narcolepsy (ADCA-DN) (Sun et al., 2014, Kernohan et al., 2016).