For the TNFAIP3 region, the rs2230926 allele and genotype were associated with PM patients or PM/DM patients (Pc = 4.0×10−3 and Pc = 0.02; Pc = 7.5×10−3 and Pc = 0.04, respectively). The gene discussed is TNFAIP3; the disease is dermatomyositis.