Spinocerebellar ataxia type 2 (SCA2) is caused by an abnormal expansion of CAG repetition (>33) in the ATXN2 gene, coding for Ataxin2 protein [17], with an estimated prevalence in certain areas of 6.57 cases per 100,000 individuals [18]. This evidence concerns the gene ATXN2 and spinocerebellar ataxia type 2.