Fig. 4From: Characteristics of non-small-cell lung cancer with interstitial pneumonia: variation in cancer location, histopathology, and frequency of postoperative acute exacerbations in interstitial pneumoniaExamples of programmed cell death ligand 1 expression levels assessed using the 22C3 antibody. a Tumor proportion score < 1%. b Tumor proportion score in the range of 1–49%. c Tumor proportion score ≥ 50%Back to article page