SCN1A and malignant migrating partial seizures of infancy: Genetic etiologies for MMPSI were first made in 2011, with the discovery of SCN1A (Nav1.1) mutations (Carranza Rojo et al., 2011), followed by TBC1D24 (protein name the same; Milh et al., 2013) and KCNT1 (Slack) mutations (Barcia et al., 2012; Epi et al., 2013; Ishii et al., 2013; McTague et al., 2013; Vanderver et al., 2014).