For instance, the expression of seven out of twelve ARCI genes was significantly increased, viz. SDR9C7, CYP4F22, ABCA12, LIPN, ALOX12B, SLC27A4 and CERS3 (0.98‐2.05 FC), as was the expression of three genes causing other types of ichthyosis, viz. GJB2, GBA and ELOVL4 (1.66‐5.69 FC). Here, SDR9C7 is linked to ichthyosis.