CD66b+ TANs mainly infiltrated in CRC tissues with a higher degree of differentiation (moderately and well differentiated) (36.70 ± 1.10 and 36.09 ± 1.06), while lowly infiltrated in poorly differentiated CRC tissues (22.54 ± 4.24) (Table 2). This evidence concerns the gene CEACAM8 and colorectal carcinoma.