The results of univariate Cox regression analysis showed that ECOG score, Lugano stage, B symptoms, IPI score, white blood cells, serum LDH, albumin, β2 microglobulin were the influencing factors of OS in PI-DLBCL patients, and ECOG score, Lugano stage, B symptoms, IPI score, white blood cells, serum LDH, albumin, β2 microglobulin were all the influencing factors of PFS in PI-DLBCL patients. This evidence concerns the gene HLA-G and diffuse large B-cell lymphoma.