Figure 1.

Representative images for PD-1, PD-L1, and TP63 expressions in DLBCL (upper lane: 200×, lower lane: 400×; EnVision). (A and B) PD-1 was immunostained in TILs. c–f: Immunostaining for PD-L1 showed that it was mainly expressed in the membrane and/or cytoplasm of tumor cells (C and D) and in the stromal cells mainly macrophages (blue arrow) and neutrophils (red arrow) (E and F). (G-H) Immunostaining for TP63 demonstrated that it was expressed in the nucleoli of tumor cells. DLBCL = diffuse large B-cell lymphoma, PD-1 = programmed cell death 1, PD-L1 = programmed cell death ligand 1, TIL = tumor-infiltrating lymphocytes, TP63 = tumor protein 63.