Clinical and genetic features of myoclonus-dystonia in 3 cases: A video presentation

Abstract
Many cases of myoclonus–dystonia (M‐D) are caused by mutations in the ϵ‐sarcoglycan (SGCE) gene. We describe 3 children with a similar clinical picture of autosomal dominant M‐D and an SGCE mutation in only one of them, suggesting that M‐D is genetically heterogeneous. © 2003 Movement Disorder Society