The mean (± standard deviation) of tumor size was 3.85 ± 0.98, 3.82 ± 0.86, and 3.93 ± 0.81 in the three t‐CEA groups (+, ++, +++), respectively, but no significant difference was observed after the variance test was applied (P = 0.487). The gene discussed is CEACAM5; the disease is neoplasm.