Pathogenic DNM1 variants affect brain development and function and cause epileptic encephalopathy associated with global developmental delay (DD) (Allen et al., 2016; Deng et al., 2016; Epi4K Consortium; Epilepsy Phenome/Genome Project, 2013; Euro E‐RESC, EpilepsyPhenome/Genome P, Epi4K Constorium, 2014; Nakashima et al., 2016). The gene discussed is DNM1; the disease is Global developmental delay.