Fig. 4

The levels of serum tumor markers in patients with and without recurrence, and in the different recurrence location. a, the levels of CA19–9 and CEA in different group of CCA patients which are no-recurrence (No, n = 81), late recurrence (Late, n = 19) and early recurrence (Early, n = 19). b, the levels of CA19–9 and CEA in different recurrence location, locoregional (n = 11) and distant recurrence/combination between locoregional recurrence with distant recurrence (n = 27). p-value less than 0.05 was considered as statistical significance