SCN1A (OMIM #182389) is one of the most important epilepsy‐related genes, with pathogenic variants leading to a wide range of phenotypes with varying disease severity (Claes et al., 2003; Escayg & Goldin, 2010; Mulley et al., 2005; Sadleir et al., 2017). The gene discussed is SCN1A; the disease is epilepsy.