CEACAM5 and neoplasm: Table 1 shows the baseline characteristics of the patients with CRC participating in the study. The mean age of the 564 patients examined was 64.3 ± 11.4 years, and the mean tumor size was 52.7 ± 23.2 mm. The mean hemoglobin, WBC, and CEA levels were 12.2 ± 2.4 g/dL, 7664.0 ± 3.0 103/μL, and 27.0 ± 303.1 ng/mL, respectively.