FGF13 and generalized epilepsy with febrile seizures plus: Mutations in FGF13 are linked to Genetic Epilepsy and Febrile Seizures Plus (GEFS+; Guillemot and Zimmer, 2011; Puranam et al., 2015), as well as Börjeson-Forssman-Lehmann syndrome, which is a rare X-linked disorder characterized by intellectual disability, obesity, seizures, hypogonadism, and distinctive facial features (Table 1; Malmgren et al., 1993; Gecz et al., 1999).