In a recent meta-analysis including 47 studies with a total of 14,367 patients who had breast cancer, Huang et al. [31] reported that PD-L1+ expression on TILs was associated with a better DFS (HR = 0.45, 95% CI: 0.28–0.73, p = 0.001) and OS (HR = 0.41, 95% CI: 0.27–0.63, p < 0.0001). Here, CD274 is linked to breast carcinoma.