Pretreatment Carcinoembryonic Antigen Level Serves as a Potential Biomarker to Guide Adjuvant Radiotherapy in pT4N+ Colon Cancer Patients

Figure 2

Kaplan–Meier curves for overall survival for pT4N + M0 CC patients who received surgery and surgery plus adjuvant radiotherapy stratified by pretreatment CEA level. (a) Elevated CEA level; (b) normal CEA level.

(a)

(b)