Fig. 3

Immunohistochemical staining of programmed death-ligand 1 (PD-L1) in renal cell carcinoma specimens. a, b Yellowish-brown PD-L1-positive staining on cell membrane in a G1 tumor; c, d PD-L1-negative staining in adjacent normal tissue
Immunohistochemical staining of programmed death-ligand 1 (PD-L1) in renal cell carcinoma specimens. a, b Yellowish-brown PD-L1-positive staining on cell membrane in a G1 tumor; c, d PD-L1-negative staining in adjacent normal tissue