Fig. 1: Multiplex immunofluorescence (mIF) staining on immune markers in primary and metastatic tumors.

A The represented images of mIF staining on PD-L1 expression, tumor cells (TCs), and immune cells (ICs) in primary tumors (PTs) and metastatic tumors (MTs). Comparison the tumor proportion score of PD-L1 expression (B), ICs infiltration (C), and immune-to-tumor cell distances (D) in non-paired PTs and MTs, Mann–Whitney test.