Prospective, Single-center, Single-arm, Clinical Trial Evaluating the Clinical Efficacy and Safety of a Novel Separable Cluster Electrode in Patients With Focal Liver Malignancies

Although RFA is widely used as a curative treatment option for a variety of liver malignancies, it is generally limited for treating tumors larger than 2 cm in diameter with a sufficient tumor-free margin. Thus, various strategies are employed to create a sufficient ablation zone such as internally cooled-electrodes, expandable electrodes and adaptation of switching mono/bipolar controllers. Despite that these attempts have created larger ablative zones in clinical and preclinical studies, the efficacy should be validated in terms of clinical outcome.

In this study, investigators evaluated the therapeutic outcomes and safety of RFA using separable clustered electrodes for treatment-naive hepatocellular carcinomas (HCCs) in comparison with RFA using multiple internally-cooled electrodes. The study group is a subgroup of our prospective study cohort (NCT02683538) and a control group is a matched historical group received RFA in our institution using multiple internally-cooled electrodes.