Figure 4. Correlation between PD-L1 gene expression and TILs by IHC.
A. Representative TILs in osteosarcoma tissues (400×); score 0 - no TILs; 1 - rare/few TILs; 2 - brisk/prominent TILs; B. There was significant positive correlation between PD-L1 gene expression and TILs in patients with osteosarcoma (P=0.0117).