CXCL12 and colorectal carcinoma: CXCL1, CXCL2, CXCL3, CXCL5, CXCL8, and CXCL12 were highly expressed in CRC tissue compared to adjacent nontumor tissue (AT) (mean log2 (CC/AT) ≥ 1), while CXCL12, CXCL13, and CXCL14 were poorly expressed in CRC tissue (mean log2 (CC/AT) ≤ 1).