Fig. 1From: Immune classification for the PD-L1 expression and tumour-infiltrating lymphocytes in colorectal adenocarcinomaImmunohistochemical staining of PD-L1, CD8, and PD-1. Intensities for positive PD-L1 immunohistochemical stains with a membranous pattern are graded as weak (a), moderate (b), and strong (c), and a negative pattern is shown in (d). High expression of CD8 (e) and PD-1 (f) are also revealed on the tumour bed (magnification: A-F, 400X)Back to article page