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Research ArticleClinical Studies

Comparison of Microwave and Radiofrequency Ablation in the Treatment of Pulmonary Metastasis of Colorectal Cancer

CHARIS TAN, OLIVER M. FISHER, LINNA HUANG, NAYEF ALZAHRANI, WINSTON LIAUW, DEREK GLENN and DAVID L. MORRIS
Anticancer Research September 2022, 42 (9) 4563-4571; DOI: https://doi.org/10.21873/anticanres.15959
CHARIS TAN
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
2St George and Sutherland Clinical School, University of New South Wales, Sydney, NSW, Australia;
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  • For correspondence: charistqy@gmail.com
OLIVER M. FISHER
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
2St George and Sutherland Clinical School, University of New South Wales, Sydney, NSW, Australia;
3Department of Surgery, University of Notre Dame, Sydney, NSW, Australia;
4St Vincent’s Centre for Applied Medical Research, Sydney, NSW, Australia;
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LINNA HUANG
5Department of Surgery, Westmead Hospital, Sydney, NSW, Australia;
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NAYEF ALZAHRANI
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
6College of Medicine, Al Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Kingdom of Saudi Arabia;
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WINSTON LIAUW
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
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DEREK GLENN
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
7Department of Radiology, St. George Hospital, Sydney, NSW, Australia;
8Department of Surgery, University of New South Wales, Sydney, NSW, Australia
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DAVID L. MORRIS
1Department of Surgery, St George Hospital, Sydney, NSW, Australia;
8Department of Surgery, University of New South Wales, Sydney, NSW, Australia
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Abstract

Background/Aim: Radiofrequency ablation (RFA) for colorectal cancer pulmonary metastases (CRCPulM) has been shown to be safe. Microwave ablation (MWA) has emerged in the treatment for CRCPulM. However, short to long-term efficacy of both modalities have yet to be understood. Patients and Methods: This is a retrospective study of 203 patients who received RFA and MWA from 2000-2018 at a major tertiary hospital in Australia. Results: A total of 161 patients underwent RFA and 42 MWA. Median ablation size and time was 4 (range=3-5 cm) vs. 3.5 cm (range=3-4 cm; p=0.0395) and 49 (range=26-65 min) vs. 8 min (5-13 min) in the RFA and MWA groups, respectively (p<0.001). The complication rate was 112 (55%) and 40 (74%) in the RFA and MWA group, respectively (p=0.011). Life-threatening pulmonary haemorrhage occurred in 1 (0.5%) and 4 (7.4%) patients in the RFA and MWA group, respectively (p=0.007). Local recurrences detected after discharge were similar in both groups [28% (p<0.001)]. However, the MWA group demonstrated higher survival rate and less recurrence rate than RFA in the first 24 months of follow up. Conclusion: RFA and MWA are competitive treatment methods for CRCPulM. Although MWA has significantly higher complication rate than RFA, it can be performed in a much shorter time and lead to a shorter length of hospital stay.

Key Words:
  • Microwave ablation
  • radiofrequency ablation
  • pulmonary metastasis
  • colorectal cancer
  • Received March 14, 2022.
  • Revision received July 11, 2022.
  • Accepted July 12, 2022.
  • Copyright © 2022 International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.
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Anticancer Research: 42 (9)
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September 2022
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Comparison of Microwave and Radiofrequency Ablation in the Treatment of Pulmonary Metastasis of Colorectal Cancer
CHARIS TAN, OLIVER M. FISHER, LINNA HUANG, NAYEF ALZAHRANI, WINSTON LIAUW, DEREK GLENN, DAVID L. MORRIS
Anticancer Research Sep 2022, 42 (9) 4563-4571; DOI: 10.21873/anticanres.15959

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Comparison of Microwave and Radiofrequency Ablation in the Treatment of Pulmonary Metastasis of Colorectal Cancer
CHARIS TAN, OLIVER M. FISHER, LINNA HUANG, NAYEF ALZAHRANI, WINSTON LIAUW, DEREK GLENN, DAVID L. MORRIS
Anticancer Research Sep 2022, 42 (9) 4563-4571; DOI: 10.21873/anticanres.15959
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