Moreover, mutations in the Cx32 gene (GJB1) are involved in the pathogenesis of X-linked Charcot–Marie–Tooth neuropathy (Scherer and Kleopa, 2012), while mutations in the gene encoding Cx43 (GJA1) result in oculodentodigital dysplasia (Paznekas et al., 2009). This evidence concerns the gene GJB1 and oculodentodigital dysplasia.