As shown in Figure 3A, the alteration frequencies of CCL genes (CCL2, CCL3, CCL4, CCL5, CCL11, CCL21, CCL26, and CCL28) in CRC were 1.3%, 1.0%, 0.9%, 1.3%, 0.7%, 0.6%, 1.1%, and 1.1%, respectively. This evidence concerns the gene CCL21 and colorectal carcinoma.