Analysis of Inflammation in the Vitiligo and Other Inflammatory Skin Diseases: Psoriasis, Atopic Dermatitis and Alopecia Areata

Inclusion Criteria: * Patients aged 18 to 75 years; * Patients with non-segmental vitiligo; * Patients with plaque psoriasis; * Patients with atopic dermatitis; * Patients with alopecia areata sclerosis; * written consent, free, informed and signed by the patient and the investigator (before any examination required by the study); * Subject affiliated or beneficiary of a social security system. Exclusion Criteria: * Patients with segmental vitiligo * Patients under local treatment (topical corticosteroid-Calcineurin inhibitor) for less than two weeks. * Patients on therapy, systemic treatments: acitretin, methotrexate, cyclosporine, Apremilast, infliximab, adalimumab, etanercept, ustekinumab, secukinumab, ixekizumab, dupilumab) for less than 4 weeks. * Pregnant or breastfeeding women * Patient (e) under guardianship * Patient (e) Non-affiliated (e) a social protection