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1
Département d'Imagerie
Médicale, Service de Radiologie
Interventionnelle, Institut Gustave Roussy, 94805 Villejuif Cedex,
France.
2
Département de
Médecine, Institut Gustave Roussy, 94805
Villejuif Cedex, France.
3
Département de Chirurgie, Institut Gustave
Roussy, 94805 Villejuif Cedex, France.
OBJECTIVE. We evaluated the feasibility, tolerance, and efficacy of percutaneous hepatic vein or segmental portal branch balloon occlusion during radiofrequency ablation of hepatic malignancies.
SUBJECTS AND METHODS. Ten tumors were treated by percutaneous radiofrequency ablation during balloon occlusion of a hepatic vein (n = 8) or a segmental portal branch (n = 2). Venous occlusion was undertaken because the tumor was in contact with a hepatic vein (n = 3) or a portal branch (n = 1); because the tumor exceeded 35 mm in width (mean, 44 mm), which was considered the maximum size amenable to ablation in a single session (n = 2); or because of both large size and contact with a hepatic vein (n = 3) or a portal branch (n = 1).
RESULTS. Vascular occlusion was always technically possible. Radiofrequency was delivered to one to three locations (mean, 1.9 locations) with a cluster electrode. The largest axis of radiofrequency-induced lesions after ablation with the cluster needle—between 42 and 51 mm (mean, 49 mm)—was always larger than the targeted tumor. These sizes were statistically larger than in a matched control group of patients who underwent radiofrequency ablation without vascular occlusion (p < 0.0003). After a mean follow-up of 12.6 months, CT and MR imaging revealed complete destruction of nine tumors after a single radiofrequency ablation treatment; one tumor required three treatments to achieve ablation. Five patients are tumorfree 12-18 months (mean, 14.4 months) after the first radiofrequency ablation treatment, and five developed new liver metastases.
CONCLUSION. Temporary hepatic vein or portal branch occlusion during radiofrequency ablation can safely facilitate the treatment of large tumors or tumors in contact with the walls of large vessels.
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