To better understand the role of NRP1 and TMPRSS2 in lung cancers, we analyzed their expression levels in tumors with web server TIMER and GEPIA, which utilize data from The Cancer Genome Atlas Program (TCGA), a comprehensive database containing genomic, epigenomic, transcriptomic, and proteomic data of both tumor tissues and the paired normal tissues. This evidence concerns the gene TMPRSS2 and cancer.