Volume 127, Issue 6, Pages 1714-1723 (December 2004) Radiofrequency ablation improves prognosis compared with ethanol injection for hepatocellular carcinoma ≤4 cm  Shi-Ming Lin, Chun-Jung Lin, Chen-Chun Lin, Chao-Wei Hsu, Yi-Cheng Chen  Gastroenterology  Volume 127, Issue 6, Pages 1714-1723 (December 2004) DOI: 10.1053/j.gastro.2004.09.003 Copyright © 2004 American Gastroenterological Association Terms and Conditions

Figure 1 Comparison of the local tumor progression rate for main tumor across the conventional PEI, higher-dose PEI, and RF ablation groups. The rate was significantly lower in the RF group than in the other 2 groups (RF vs conventional PEI, P = .012; RF vs higher-dose PEI, P = .037). The difference between RF and conventional or higher-dose PEI becomes clear by looking at the data on a year-by-year basis. closed square, conventional PEI group; closed triangle, higher-dose PEI group; closed circle, RF group. Gastroenterology 2004 127, 1714-1723DOI: (10.1053/j.gastro.2004.09.003) Copyright © 2004 American Gastroenterological Association Terms and Conditions

Figure 2 Comparison of the overall survival rate across the conventional PEI, higher-dose PEI, and RF ablation groups. The rate was significantly higher in the RF group than in the other 2 groups (RF vs conventional PEI, P = .014; RF vs higher-dose PEI, P = .023). The difference between RF and conventional or higher-dose PEI becomes clear by looking at the data on a year-by-year basis. closed square, conventional PEI group; closed triangle, higher-dose PEI group; closed circle, RF group. Gastroenterology 2004 127, 1714-1723DOI: (10.1053/j.gastro.2004.09.003) Copyright © 2004 American Gastroenterological Association Terms and Conditions

Figure 3 Comparison of the cancer-free survival rate across the conventional PEI, higher-dose PEI, and RF ablation groups. The rate was significantly higher in the RF group than in the other 2 groups (RF vs conventional PEI, P = .019; RF vs higher-dose PEI, P = .024). The difference between RF and conventional or higher-dose PEI becomes clear by looking at the data on a year-by-year basis. closed square, conventional PEI group; closed triangle, higher-dose PEI group; closed circle, RF group. Gastroenterology 2004 127, 1714-1723DOI: (10.1053/j.gastro.2004.09.003) Copyright © 2004 American Gastroenterological Association Terms and Conditions