Interestingly, four de novo inter-chromosomal translocations involving the intergenic region FOXG1-PRKD1 were identified in patients with Rett syndrome, congenital variant (OMIM:613454) (Goubau et al., 2013; Mehrjouy et al., 2018), which was also named as FOXG1-related encephalopathy. Here, FOXG1 is linked to atypical Rett syndrome.