When studying the cytokine link in patients with gastric cancer at different stages of the disease, we found an increase in TNF-α in patients at stages I, II, and III of the disease compared to the control group and the group of patients at stage IV of the disease (p1–2 < 0.001, p1–3 < 0.001, p1–4 < 0.001) (Table 2). The gene discussed is TNF; the disease is gastric cancer.