Patients with missense mutations in KIF2A exhibit so called cortical dysplasia complex with other brain malformations (CDCBM), a type of MCD characterized by posterior agyria/pachygyria, microcephaly and severe motor dysfunction; and most of them suffer childhood epilepsy (Poirier et al., 2013; Tian et al., 2016; Cavallin et al., 2017; Costain et al., 2019; Hatano et al., 2021). The gene discussed is KIF2A; the disease is microcephaly.