Fig. 5

Receiver operating characteristic curve of prediction models of 5-year recurrence-free survival for patients with hepatocellular carcinoma without preoperative antitumor treatment

ROC curve performed by k-Nearest Neighbors algorithm of (A) Milan criteria vs. Milan criteria incorporated with tumor micronecrosis, (B) MELD score vs. MELD score incorporated with tumor micronecrosis, and (C) AFP level vs. AFP level incorporated with tumor micronecrosis.