The OS curve and PFS curve of patients with DLBCL, NOS based on the infiltration of FOXP3/CTLA-4 double-positive cells. Patients with high levels of FOXP3/CTLA-4 double-positive cells were more significantly associated with a poor prognosis than patients with low levels of FOXP3/CTLA-4 double-positive cells for OS (A) and PFS (B).