Compared with normal control tissues, the expression level of CD3D and CD2 in tumor tissues were not significantly different (Fig. 7c, d), while the expression levels of CD3E, CD3G, CCL5, CXCR6 and LCK in tumor tissues were lower than those in normal tissues (P < 0.05) (Fig. 7e-i). This evidence concerns the gene CXCR6 and neoplasm.