In addition, serum IL-17A levels of patients with progressive vitiligo (median 4.35 (2.78–32.26) pg/mL) were significantly higher than those with stable vitiligo (median 2.26 (1.94–6.32) pg/mL, P = 0.014) as well as healthy controls (median 2.66 (1.85–4.79) pg/mL, P = 0.002). The gene discussed is IL17A; the disease is vitiligo.