A Case of Familial Paroxysmal Non-kinesigenic Dyskinesia in Mainland China: A Clinical and Genetic Investigation

Paroxysmal non-kinesigenic dyskinesia (PNKD) is an autosomal dominant condition characterized by recurring dystonia or mixed chorea and ballism caused by emotional stress, exhaustion, coffee, alcohol, menstruation, and other factors. Here, we provide a large family PNKD pedigree from mainland China, where the same c.20C4T (p.Ala7Val) mutation in exon 1 of the PNKD gene was genetically confirmed to be present in nine affected individuals. Here, we report a rarely described Asian PNKD pedigree and aim to widen the clinical and genetic spectrum of PNKD while also providing fresh diagnostic insights for this rare condition.