Fig. 2From: Differential expressions of PD-1, PD-L1 and PD-L2 between primary and metastatic sites in renal cell carcinomaThe association of expressions of immune checkpoints with clinical outcomes in patients with RCC. Representative images of kaplan–Meier survival curves of PD-1 expression either in the primary or metastatic tumors in the whole cohort (a-b), PD-L1 expression in the primary tumor (c-d) and PD-L2 expression in the primary tumor (e-f)Back to article page