Percutaneous radiofrequency ablation of hepatic neoplasms using a clustered electrode - First clinical results.

Purpose: To evaluate feasibility, safety and efficacy of percutaneous radio frequency ablation (RFA) of hepatic neoplasms using a clustered electrode. Material and Methods: Percutaneous, CT-guided RFA using a clustered electro de was performed in 12 patients with a total of 15 hepatic neoplasms (2.0-6 .0 cm in diameter). Results: A total of 17 percutaneous RFA was performed. The mean total procedure time was 2.0 h (1.5-2.5 h). Placement of the clust ered electrode within the neoplasms using a inter- or subcostal approach un der local anesthesia was possible in all cases. Complications related to pe rcutaneous treatment and technical problems were not encountered. Diameter of the ablated areas ranged between 3.0-7.0 cm. Technical success was obser ved in 13 of 15 neoplasms (86.6%). During a mean follow-up of 7.25 months ( range 3-12 months) 8 of 12 neoplasms showed a complete necrosis. Conclusion : Percutaneous RFA using a clustered electrode is a feasible, safe and effe ctive procedure for the treatment of hepatic neoplasms up to 6 cm in size.