Poster Author of 1 e-Poster
SE-089 - Simultaneous microwave ablation using multiple antennas for the treatment of liver malignant lesions
Author of 1 Presentation
SE-089 - Simultaneous microwave ablation using multiple antennas for the treatment of liver malignant lesions
Abstract
Purpose
To evaluate efficacy and safety of percutaneous microwave ablation (MWA) using simultaneous activation of two antennas for the treatment of liver malignant lesions.
Material and methods
25 MWA procedures of liver malignant lesions were performed: 5 (20%) HCC, 14 (56%) unresectable liver metastases and 6 (24%) recurrences of treated liver metastases. MWA was performed with simultaneous activation of two antennas with a spacing of 1.5 or 2.0. Microwave energy was applied for 10 min with a power of 65 W. The sizes of the ablative zones created were recorded. Technical success was defined as complete target devascularization at the immediate post-procedural CT. One, 3 and 6 months post-procedure follow-up was performed and major and minor complications were reported.
Results
Mean tumor size was 3.5cm (3-7cm). Full technical success was achieved in all treated liver malignant lesions. Mean short-axis diameter of the ablation zone was 6.0cm (4.8-9cm). All ablative zones were spherical or ellipsoid in both the axial and transverse planes with an antenna spacing of 2.0 cm or less. Artificial dissection was performed in one case (4.8%) due to diaphragm proximity. In three cases (14%) peri-procedural complications were observed: one subcapsular hemorrhage, one biloma and one peripheral portal thrombosis. Recurrence of disease was reported in three cases (14%) at 3 months follow-up. All recidivated lesions had a maximum size ≥5cm (5-7cm).
Conclusion
Our results provide preliminary evidence of efficacy, creating a larger necrotic area, and safety, for the low complication rate, of simultaneous MWA using multiple antennas for local control of liver malignant lesions.