Fig. 2
From: Expression of PD-L1 through evolution phase from pre-invasive to invasive lung adenocarcinoma
PD-L1 positive rate and expression level in AIS, MIA and IAC of stage IA1–IA3 A The percentages of PD-L1-positive (≥ 1%) samples and PD-L1-strongly-positive (≥ 50%) samples increased according to lung adenocarcinoma invasiveness from AIS to IAC (IA1–IA3) (p < 0.001). B The PD-L1 expression level increased according to lung adenocarcinoma invasiveness from AIS to IAC (IA1–IA3) (*p < 0.05, **p < 0.01)