Heterogeneous Distribution of PD-L1 Expression in the IASLC/ATS/ERS Classification of Lung Adenocarcinoma

94 lung adenocarcinoma cases were reviewed in the Third Affiliated Hospital of Soochow University from January to December 2019. PD-L1 (DAKO 22C3) was used to test the PD-L1 expression in lung cancer tissue.