Figure 1From: Carcinoembryonic antigen (CEA) level, CEA ratio, and treatment outcome of rectal cancer patients receiving pre-operative chemoradiation and surgeryComparison of local control between group L, H-L and H-H. Group L: pre-CRT CEA <6 ng/ml; Group H-L: pre-CRT CEA ≥6 ng/ml and post-CRT CEA <6 ng/ml; Group H-H: both pre- and post-CRT CEA ≥6 ng/ml.Back to article page