The expanded NK cells express the chemokine receptors CXCR3, CCR5, and CXCR6 (Figure 2C), and the lung of tumor-resected mice express mRNA of the corresponding ligands CXCL9/10/11, CCL3/4/5, and CXCL16 (Figure 2D). This evidence concerns the gene CCR5 and neoplasm.