Fig. 2

PD-L1 expression in ADC and SQCC study groups. Representative images of PD-L1 expression in cell membrane of tumor cells (TC) from ADC (Aa) and SQCC (Ab) subjects, and in cytoplasm from ADC subjects (Ac). Magnification, × 20. B: The percent frequencies of PD-L1 intensity in four categories (negative, weak, moderate and strong positive) in TC and immune cells (IC) from subjects as indicated. C: The percent frequencies of PD-L1 intensity in two categories (negative, and positive) as indicated