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. Here, FCRL3 is linked to diffuse large B-cell lymphoma.