Among the many chemokines or cytokines, MCP‐1 is a vital monocyte‐attracting chemokine with strong chemotaxis activity, and potently recruits blood monocytes to inflammatory or tumour sites26, 27; LTB4 is a chemokine with a strong effect on neutrophils, playing an important role in the chemotaxis and infiltration of neutrophils.28 The gene discussed is CCL2; the disease is neoplasm.