2.2.2. Oculodentodigital Dysplasia (ODDD), Craniometaphyseal Dysplasia Autosomal Recessive (CMDR), Pantopalmar Keratoderma and Alopecia (PKA), Erythrokeratodermia Variabilis et Progressiva (EKVP), Syndactyly Type III––Cx43 Mutations. Here, GJA1 is linked to erythrokeratodermia variabilis.