As shown in Fig. 5 and Table 2, the serum IFN-α concentration discriminated type 1 AIP/IgG4-RD patients from CP patients with an AUC value of 0.9306, a sensitivity of 85.7%, and a specificity of 91.7%. The gene discussed is IFNA1; the disease is immunoglobulin G4-related sclerosing disease.