Percutaneous ultrasound guided radiofrequency and microwave ablation in the treatment of hepatic metastases. A monocentric initial experience

Percutaneous radiofrequency (RFA) and microwave ablation (MWA) are currently the best treatment options forpatients with liver metastases (LM) who cannot undergo a liver resection procedure. Presently, few studies have evaluated theefficacy of tumor ablation in beginner's hands but none at all...

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Veröffentlicht in:Medical ultrasonography 2019-08, Vol.21 (3), p.217-224
Hauptverfasser: Sparchez, Zeno, Mocan, Tudor, Hajjar, Nadim All, Bartos, Adrian, Hagiu, Claudia, Matei, Daniela, Craciun, Rares, Mocan, Lavinia Patricia, Sparchez, Mihaela, Leucuta, Daniel Corneliu
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container_end_page 224
container_issue 3
container_start_page 217
container_title Medical ultrasonography
container_volume 21
creator Sparchez, Zeno
Mocan, Tudor
Hajjar, Nadim All
Bartos, Adrian
Hagiu, Claudia
Matei, Daniela
Craciun, Rares
Mocan, Lavinia Patricia
Sparchez, Mihaela
Leucuta, Daniel Corneliu
description Percutaneous radiofrequency (RFA) and microwave ablation (MWA) are currently the best treatment options forpatients with liver metastases (LM) who cannot undergo a liver resection procedure. Presently, few studies have evaluated theefficacy of tumor ablation in beginner's hands but none at all in hepatic metastasis. Our aim was to report the initial experiencewith ultrasound as a tool to guide tumor ablation in a low volume center with no experience in tumor ablation. We conducted a retrospective cohort study, on a series of 61 patients who had undergone percutaneous US-guided ablations for 82 LM between 2010 and 2015. Long term outcome predictors were assessed using univariate and multivariate analysis. Complete ablation was achieved in 86.9% of cases (53/61). All MWA sessions (20/20) attained ablation margins >5mm, compared to 79% (49/62) for RFA sessions (p=0.031). Ablation time was significantly shorter for MWA, with a median duration of 10 minutes (range: 6-12) vs. 14 minutes (range: 10-19.5, p=0.003). There was no statistically significant difference in local tumor progression (LTP)-free survival rates between MWA and RFA (p=0.154). On univariate analysis, significant predictors for local recurrence were multiple metastases (p=0.013) and ablation margins
doi_str_mv 10.11152/mu-1957
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Our aim was to report the initial experiencewith ultrasound as a tool to guide tumor ablation in a low volume center with no experience in tumor ablation. We conducted a retrospective cohort study, on a series of 61 patients who had undergone percutaneous US-guided ablations for 82 LM between 2010 and 2015. Long term outcome predictors were assessed using univariate and multivariate analysis. Complete ablation was achieved in 86.9% of cases (53/61). All MWA sessions (20/20) attained ablation margins &gt;5mm, compared to 79% (49/62) for RFA sessions (p=0.031). Ablation time was significantly shorter for MWA, with a median duration of 10 minutes (range: 6-12) vs. 14 minutes (range: 10-19.5, p=0.003). There was no statistically significant difference in local tumor progression (LTP)-free survival rates between MWA and RFA (p=0.154). On univariate analysis, significant predictors for local recurrence were multiple metastases (p=0.013) and ablation margins &lt;5 mm (p&lt;.001), both retaining significance on multivariate analysis. Significant predictors for distant recurrence on both univariate and multivariate analysis were multiple metastases (p&lt;0.001) and non-colorectal cancer metastases (p&lt;0.05). A larger than 5 mm ablation size is critical for local tumor control. 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subjects Ablation
Ablation Techniques - methods
Cancer therapies
Catheter Ablation - methods
Chemotherapy
Cohort Studies
Colorectal cancer
Computed tomography
Electrodes
Female
Gallbladder
Heat sinks
Humans
Laboratory tests
Liver
Liver - diagnostic imaging
Liver - surgery
Liver Neoplasms - diagnostic imaging
Liver Neoplasms - secondary
Liver Neoplasms - surgery
Magnetic resonance imaging
Male
Medical imaging
Metastasis
Microwaves
Middle Aged
Parameter identification
Patients
Radio frequency
Retrospective Studies
Studies
Tomography
Treatment Outcome
Tumors
Ultrasonic imaging
Ultrasonography, Interventional - methods
title Percutaneous ultrasound guided radiofrequency and microwave ablation in the treatment of hepatic metastases. A monocentric initial experience
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