KCNA2 and developmental and epileptic encephalopathy: Masnada et al. (2017) described an ESES-like pattern in KCNA2-related developmental and epileptic encephalopathy (DEE). In 2018, a systematic review on all reported genetic etiologies of ESES-related syndrome summarized 11 monogenic variants identified in 60 cases (Kessi et al., 2018).