ATXN2 and Parkinson disease: In the first report of a Chinese family with SCA2 gene mutations and Parkinsonism, a family of four had 33 to 36 CAG amplifications.[3] In a report from South Korea,[8] 30 patients with ataxia had 38 to 51 CAG repeats, and among them 3 patients with Parkinsonism whose numbers of repeats were 32, 34, and 35.