Although one additional pediatric case of myoclonic dystonia has been related to a CACNA1B variant in a Taiwanese large cohort of patients with isolated and combined dystonia [107], the variant carried by this particular patient is classified as likely benign (PM2, BP1, BP4) according to the American College of Medical Genetics and Genomics–Association for Molecular Pathology (ACMG-AMP) classification [108], leaving the role of CACNA1B in the onset of myoclonic dystonia still debatable. Here, CACNA1B is linked to myoclonus-dystonia syndrome.