Fig. 2From: A prognostic model for stratification of stage IB/IIA esophageal squamous cell carcinoma: a retrospective studyImmunohistochemical staining of PD-L1 in ESCC paraffin tissue with stage IB/IIA (a Low expression of PD-L1, staining intensity score was 1 point, staining extent score was 1 point, final score was 1 point; b High expression of PD-L1, staining intensity score was 3 points, staining extent score was 2 points, final score was 6 points)Back to article page