CD274 and diffuse large B-cell lymphoma: Levels of PD‐L1 mRNA in PBMCs were significantly higher in ENKTL patients [2.23 (1.16‐6.70), P < .001] and DLBCL patients [1.25 (0.81‐1.99), P < .001] than in healthy controls [0.77 (0.56‐0.96)] (Figure 2A,B).