Analysis by image‐pro plus software (Media Cybernetics, Silver Spring, MD, USA) revealed that the KLF7 protein level was significantly elevated in squamous carcinoma samples as shown in Fig. 2A,B and Table S2, which was consistent with KLF7 mRNA expression analysis in matched squamous carcinoma and surgical margin tissues in TCGA. This evidence concerns the gene KLF7 and squamous cell carcinoma.