Three SNPs (rs7517847, rs11465804, and rs11209026, respectively) are located in the IL23R gene, encoding the receptor of interleukin 23, which is involved in differentiation of the differentiated Th17 T cell population, and the development of autoimmune and inflammatory disorders has been identified as susceptibility variants for sarcoidosis [68]. The gene discussed is IL23R; the disease is sarcoidosis.