The present case presented gaze-evoked nystagmus without retinitis pigmentosa common in childhood SCA2 due to long CAG repeats in ATXN2 gene (see Table 2), greater than one hundred repeats (Babovic et al., 1998; Mao et al., 2002; Paciorkowski et al., 2011; Di Fabio et al., 2012; Vinther-Jensen et al., 2013; Avelino et al., 2014; Singh et al., 2014). The gene discussed is ATXN2; the disease is spinocerebellar ataxia type 2.