FAM3C and Alzheimer disease: Interestingly, the ILEI signature was not only able to distinguish psoriasis from normal condition, but it also separated AD from both, normal and psoriasis conditions, indicating that genes of the signature are important in both diseases, but at the same time, they might have different weighting in the two pathological conditions, and thus, ILEI‐linked pathways might have distinctive regulations in the different diseases.