Using the publicly available gene expression database The Cancer Genome Atlas (TCGA), we found that there was no significant difference in the expression level of Trop2 between NSCLC and paracancerous tissues, but the expression level of Trop2 in NSCLC tissues with EGFR mutation was higher than that in paracancerous tissues (Fig. 1A). This evidence concerns the gene EGFR and non-small cell lung carcinoma.