ADCA type 1 refers to cerebellar ataxia accompanied by a range of additional features, encompassing conditions like SCA1-4, 8, 10, 12-14, 15, 17-22, 25, 27, 28, 31, 32, 34-37, 38, 42-44, 46, and 47, as well as DNMT1-related ataxia and DRPLA [1]. This evidence concerns the gene ATN1 and cerebellar ataxia.