In the HPA database, protein expressions of the seven genes (ADAMTS8, CCR2, CYSLTR2, FAM129C, FCER1A, GAPT, PKHD1L1, and ZNF831) were markedly low in tumor tissues with less intense antibody staining and fewer stained cells in LUAD (Figure 7). This evidence concerns the gene CCR2 and neoplasm.