Fig. 1From: FDG-PET in the evaluation of response to nivolumab in recurrent non-small-cell lung cancerHematoxylin and eosin (H&E) staining (×100) (a) and immunohistochemical staining for PD-L1 (b) of surgically resected NSCLC tissue. H&E staining showed invasive adenocarcinoma papillary predominant type and immunohistochemical staining showed negative for PD-L1Back to article page