According to ROC curve, high intratumoral CD66b+ neutrophil was examined in 29/229 (12.7%) of normal colorectal mucosal tissues, in 104/229 (45.4%) of primary CRC tissues and in 16/30 (53.3%) of lymph node metastatic CRC tissues (P<0.001, Chi-square test). Here, CEACAM8 is linked to colorectal carcinoma.