CXCL8 and neoplasm: When comparing groups with different responses to chemotherapy, it was found that in the group of patients with disease progression (against the background of chemotherapy), the level of CXCL8 mRNA in the tumor was statistically significantly higher compared to patients with early relapse and without relapse for more than 3 years (p1 = 0.0008; p2 = 0.001).