Fig. 3

a DFS and b OS of patients with ypStage 0 to I (n = 7, solid line) and ypStage ≥ II (n = 6, dotted line). The median DFS was not reached in either group of patients (p = 0.203). The median survival time (MST) of patients with ypStage 0 to I was not reached, whereas that of patients with ypStage ≥ II was 11.0 months (p = 0.044). DFS, disease-free survival; OS, overall survival