Fig. 6

Representative examples of the hematoxylin and eosin (H&E), epidermal growth factor receptor (EGFR), cytokeratin AE1/3 (CK AE1/3) and programmed death-ligand 1 (PD-L1) staining of 4 μm tissue sections for a normal and fast cleared tumor biopsy and a control (not cleared) biopsy.