CEACAM5 and cancer: CRC patients with serum CEA level < 5 ng/ml (P < 0.001; Figure 1) or albumin level ≥ 3.5 gm/dl (P < 0.001; Figure 2) had significantly greater cancer-specific survival rates than those with serum CEA levels ≥ 5 ng/ml or albumin level <3.5 gm/dl respectively.