Percutaneous radiofrequency ablation of hepatic neoplasms using a "cluster" electrode--first clinical results

Objective: To evaluate feasibility, safety and efficacy of percutaneous radiofrequency ablation (RFA) of hepatic neoplasms using a clustered electrode.

Methods: Percutaneous, CT-guided RFA using a clustered electrode 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 clustered electrode within the neoplasms using a inter- or subcostal approach under local anesthesia was possible in all cases. Complications related to percutaneous treatment and technical problems were not encountered. Diameter of the ablated areas ranged between 3.0-7.0 cm. Technical success was observed 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.

Conclusions: Percutaneous RFA using a clustered electrode is a feasible, safe and effective procedure for the treatment of hepatic neoplasms up to 6 cm in size.