IL17A and discoid lupus erythematosus: In regard to IL-17 serum concentration, it was increased in DLE patients (median: 5.3 pg/mL, range: 3.4–10.4 pg/mL) versus SCLE patients (median: 4.5 pg/mL, range: 2.3–6.8 pg/mL; P = 0.05).