Besides SCA7, eight other neurodegenerative disorders including Huntington’s disease (HD), dentatorubral pallidolusian atrophy, spinal bulbar muscular atrophy, and SCA1-3, 6, and 17, caused by CAG/glutamine expansions, have been identified (Katsuno et al. 2008). This evidence concerns the gene ATXN7 and Huntington disease.