On the other hand, when ATAD3 gene rearrangements affected the ATAD3B/ATAD3C genes on one allele and the ATAD3A/ATAD3B genes on the other, late-onset encephalopathy with cerebellar atrophy, ataxia, and dystonia was seen as the clinical effect. The gene discussed is ATAD3B; the disease is cerebellar ataxia.