Heterogeneity of PD-L1 Expression Among the Different Histological Components and Metastatic Lymph Nodes in Patients With Resected Lung Adenosquamous Carcinoma

PD-L1 expression showed discrepancy in different histological components within a tumor and consistency in paired histological type between tumor and metastases. Different pathological features might contribute to the heterogeneous PD-L1 expression in patients with non-small-cell lung cancer.