Kaplan-Meier curves of CA 72.4 and CEA at stage II CRC. Kaplan Meier curves of 1) the disease free survival and 2) the overall survival, for colorectal cancer patients that received curative resection of TNM stage II tumours, stratified by preoperative serum levels of A) CA 72.4, B) CEA and C) At least one or both markers with positive levels. D.F.S.: Disease free survival, O.S.: Overall survival. P: Statistical significance.
Ayude et al. BMC Cancer 2013 13:543 doi:10.1186/1471-2407-13-543