Patients with LC with different Child-Pugh classes also demonstrated differences in EBI3, FOXP3 and IL-17 protein expression levels (EBI3, Child-Pugh A had relatively high expression; IL-17, Child-Pugh C had relatively high expression; and FOXP3, Child-Pugh A had relatively high expression). The gene discussed is IL17A; the disease is laryngotracheoesophageal cleft.