IL6 and cancer: Using The Cancer Genome Atlas Lung Squamous Cell Carcinoma database, several genes are highly expressed in cases with PDPN‐expressing CAFs, including interleukin (IL)‐1A, IL‐1B, IL‐6, IL‐10, CCL2, colony‐stimulating factor 1 (CSF1), FGF2, galectin 1, PDGFA, PDGFB and TGF‐β1.