We finally obtained 10 genes that are closely associated with the prognosis of DLBCL patients, including CXCL9, TIFAB, C3, VCVAM1, ZBE, D2, TIMD4, KLHL14, TNFRSF9, FCRL3, and PLEKHG1. The gene discussed is TNFRSF9; the disease is diffuse large B-cell lymphoma.