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. 2019 Feb 13;32(7):929–942. doi: 10.1038/s41379-019-0210-3

Fig. 2.

Fig. 2

Scoring intensity of the majority of cells in the fields represented (22C3). a 0: negative. b 1 + : dim positive. c 2 + : moderate positive. d 3 + : strong positive. e 3 + : very strong positive; this latter pattern appears as uniform, intense membranous, and cytoplasmic staining. Although not specific, this may indicate constitutive overexpression of PD-L1 by tumor cells