Furthermore, fetal valproate exposure has been reported to cause other malformation complexes such as Baller-Gerold syndrome (BGS, OMIM #218600), an ultra-rare disorder caused by pathogenic variants in the RECQL4 gene on chromosome 8p24, and inherited in an autosomal recessive manner (Baller, 1950; Gerold, 1959). The gene discussed is RECQL4; the disease is Baller-Gerold syndrome.