In the present study, we analyzed the expression level changes to E2F1 in NSCLC tissues and adjacent tissues from the GTEx project (http://gepia.cancer-pku.cn/) 48 and examined the expression level changes to E2F1 in 60 pairs of NSCLC tissues and paracancerous tissues harvested by us by qRT-PCR assay. Here, E2F1 is linked to non-small cell lung carcinoma.