Figure 2

Mean levels of four tumor markers before and after neoadjuvant chemotherapy. A. Mean level of CEA was decreased significantly after neoadjuvant chemotherapy (P = 0.030). B. Mean level of CA19-9 was decreased after neoadjuvant chemotherapy, the difference was not statistically significant (P = 0.251). C. Mean level of CA72-4 was decreased significantly after neoadjuvant chemotherapy (P = 0.010). D. Mean level of CA242 was decreased significantly after neoadjuvant chemotherapy (P = 0.009).