In a study by Ahn et al., differential gene expression and ingenuity pathway analysis performed on biopsies isolated from chronic plaque (CP), scalp psoriasis (SP) or palmoplantar psoriasis (HF) [17] revealed that CX26 and CX30 were enhanced in CP and SP compared to NN tissue, in line with the present study. This evidence concerns the gene GJB6 and hydrops fetalis.