question: List clinical phenotypes and molecular genetic features of patients with KMT2B-related disorders
answer: Atypical patterns of dystonia evolution and a subgroup of patients presents with a non-dystonic neurodevelopmental phenotype. In addition to the previously reported systemic features there seem to be co-morbidities, including the risk of status dystonicus, intrauterine growth retardation, and endocrinopathies.