Fig. 2From: Consistent expression of PD-L1 in tumor microenvironment with peripheral PD-1/PD-L1 in circulating T lymphocytes of operable breast cancer: a diagnostic testThe high and the low level of PD-L1 positive immune cells in TME, A Patients with low level of PD-L1 positive immune cells in TME (IHC × 400), B Patients with high level of PD-L1 positive immune cells in TME (IHC × 400)Back to article page