Supporting this finding, correlation analysis of gene expression data of a TCGA cohort of KRAS‐mutant lung cancer patients (n = 141) revealed that the mRNA level of PLK1 is significantly negatively correlated with that of FGFR pathway genes, in particular strongly correlated (Spearman's ρ > 0.3) with FGFR2, FGFR3, and several FGFs (e.g., FGF14, FGF22), the cognate ligands of FGFR and triggers of FGFR‐mediated signaling (Appendix Fig S3A). This evidence concerns the gene FGFR2 and lung cancer.