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Published in: CardioVascular and Interventional Radiology 1/2008

01-01-2008 | Clinical Investigation

Factors Limiting Complete Tumor Ablation by Radiofrequency Ablation

Authors: Erwan Paulet, Christophe Aubé, Patrick Pessaux, Jerome Lebigot, Emilie Lhermitte, Frederic Oberti, Anne Ponthieux, Paul Calès, Catherine Ridereau-Zins, Philippe L. Pereira

Published in: CardioVascular and Interventional Radiology | Issue 1/2008

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Abstract

The purpose of this study was to determine radiological or physical factors to predict the risk of residual mass or local recurrence of primary and secondary hepatic tumors treated by radiofrequency ablation (RFA). Eighty-two patients, with 146 lesions (80 hepatocellular carcinomas, 66 metastases), were treated by RFA. Morphological parameters of the lesions included size, location, number, ultrasound echogenicity, computed tomography density, and magnetic resonance signal intensity were obtained before and after treatment. Parameters of the generator were recorded during radiofrequency application. The recurrence-free group was statistically compared to the recurrence and residual mass groups on all these parameters. Twenty residual masses were detected. Twenty-nine lesions recurred after a mean follow-up of 18 months. Size was a predictive parameter. Patients’ sex and age and the echogenicity and density of lesions were significantly different for the recurrence and residual mass groups compared to the recurrence-free group (p < 0.05). The presence of an enhanced ring on the magnetic resonance control was more frequent in the recurrence and residual mass groups. In the group of patients with residual lesions, analysis of physical parameters showed a significant increase (p < 0.05) in the time necessary for the temperature to rise. In conclusion, this study confirms risk factors of recurrence such as the size of the tumor and emphasizes other factors such as a posttreatment enhanced ring and an increase in the time necessary for the rise in temperature. These factors should be taken into consideration when performing RFA and during follow-up.
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Metadata
Title
Factors Limiting Complete Tumor Ablation by Radiofrequency Ablation
Authors
Erwan Paulet
Christophe Aubé
Patrick Pessaux
Jerome Lebigot
Emilie Lhermitte
Frederic Oberti
Anne Ponthieux
Paul Calès
Catherine Ridereau-Zins
Philippe L. Pereira
Publication date
01-01-2008
Publisher
Springer-Verlag
Published in
CardioVascular and Interventional Radiology / Issue 1/2008
Print ISSN: 0174-1551
Electronic ISSN: 1432-086X
DOI
https://doi.org/10.1007/s00270-007-9208-1

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