Clinical Research Directory

Inclusion Criteria: * Informed consent/assent provided by the participant (when appropriate), and/or participant's parent(s) or legally authorized representative(s). * Ability to travel to the study site and adhere to study-related follow-up examinations and/or procedures and provide access to participant's medical records. * Clinical phenotype and neuroimaging consistent with a diagnosis of ATN1 mutation associated Dentatorubral-pallidoluysian atrophy (DRPLA). * Documented genetic mutation in ATN1. Exclusion Criteria: * Participant has any known contraindication to or unwillingness to undergo lumbar puncture. * Use of investigational medication within 5 half-lives of the drug at enrollment. * Participant has any condition that in the opinion of the Site Investigator, would ultimately prevent the completion of study procedures.