CD274 and neoplasm: Some studies find no correlation between the expression of PD-L1 in tumor cells and OS in DLBCL patients [72, 73], while others suggest worse OS for PD-L1 + DLBCL patients [74].The present study employed DLBCL as the subject and verified the negative influence of tumor cell PD-L1 expression on patient prognosis (PFS and OS).