The connection between clinicopathological features and mSEPT9 in 130 CRC patients, age, gender, and tumor location of CRC patients did not vary significantly in the preoperative mSEPT9-negative and positive groups (P > 0.05), and the differences between TNM staging, the level of differentiation, and the level of preoperative CEA expression were statistically significant in the two groups (P < 0.05) (Table 1). Here, CEACAM5 is linked to neoplasm.