In terms of overall survival (P = 0.259) and recurrence free survival (P = 0.324), there were no significant differences between these two groups. Figure 1 Cumulative overall survival rate. The 1-, 3-and 5-year overall survival rates after percutaneous radiofrequency thermal ablation (PRFA) and surgical resection (SR) were 95.4%, 79.6% and 63.1%, respectively in the PRFA group and 100%, 81.4% and 74.6%, respectively in the SR group. There was no significant difference between these two groups as determined using the log-rank test (P = 0.259).