In psoriasis an association with three variants of the IL-13 gene was observed [38]: rs1800925, rs20541, and rs848 (This cytokine, such as IL-4 and IL-10, is secreted by Th2 lymphocytes and seems to be important in the innate and adaptive immune response dysregulation that leads to psoriasis). The gene discussed is IL10; the disease is psoriasis.