To sum it up, the RFA lesion of our electrode is influenced by three hierarchical factors. On the system level, the rationally controlled ablation time and applied voltage/power offer energy to the electrode. On the electrode level, three sub-electrode can individually expand to conform to target tissues and share delivered energy. On the sub-electrode level, the stylet and cannula in each sub-electrode further morph by adjusting their relative position and hence expanded length. Thanks to these factors, our electrode can thus have high potential to meet diverse demands of tumor treatments with various morphologic appearances.