Radiofrequency Ablation Using Octopus Electrodes for Small Hepatocellular Carcinoma With No-touch Technique

Inclusion Criteria: * Child-Pugh class A liver function * 1 - 2.5 cm sized Single nodular HCC * without history of previous HCC treatment or with evidence of no recurrence at least 2 years after previous HCC treatment Exclusion Criteria: * more than 2 HCC * tumor size larger than 2.5 cm * Child-Pugh class B or C liver function * invisible tumor even after real-time fusion US guidance * accompanied by vascular invasion or distant metastasis * presence of coagulopathy defined as platelet count \< 50,000/mm3 and/or PT-INR \> 50%