Comparison between the mRNA expression levels of these genes in gastric cancer (identified as STAD) and in normal tissues revealed the following results with statistical significance (p < 0.05): overexpression of the AJUBA, CD80, NOLC1 and KNL1 genes and hypoexpression of the CCDC69 gene in gastric cells (Figure 3). The gene discussed is CD80; the disease is gastric cancer.