ATXN3 and Parkinson disease: The most common subtypes are SCA2, SCA3, and SCA17.[1] SCA2 has been recently recognized as an uncommon cause of Parkinsonism, an alternate presentation to the typical cerebellar disorder.[2] This phenotype appears to be occur preferentially in Asian populations.[3] Whether it is ataxia or Parkinsonism, a family's clinical manifestations are always the same; reports of one family showing different neurological phenotypes are rare.