IL17A and psoriasis: Therefore, further studies are needed to clarify which types of atopic dermatitis can be treated with vitamin D. In addition, atopic dermatitis in Asian people is highly related to the induction of inflammatory cytokines, such as IL-17A, IL-19, and IL-22 in lesional and/or nonlesional skin compared with European patients with atopic dermatitis, suggesting a unique immune phenotype, combining characteristics of atopic dermatitis and psoriasis [39].