Fig. 2

Kaplan-Meier estimates of DFS probabilities in patients with operable HCC using a cutoff value of 2 CTCs per 7.5 ml of peripheral blood. a Preoperative CTC < 2 or ≥ 2, training set; b Preoperative CTC < 2 or ≥ 2, validation set; c Preoperative CTC < 2 or ≥ 2, full data set; d Postoperative CTC < 2 or ≥ 2, training set; e Postoperative CTC < 2 or ≥ 2, validation set; f Postoperative CTC < 2 or ≥ 2, full data set