Open Access

Short term treatment results of local ablation with water‑cooled microwave antenna for liver cancer: Comparison with radiofrequency ablation

  • Authors:
    • Kanehiko Suwa
    • Toshihito Seki
    • Rinako Tsuda
    • Masao Yamashina
    • Miki Murata
    • Takashi Yamaguchi
    • Akiyoshi Nishio
    • Kazuichi Okazaki
  • View Affiliations

  • Published online on: January 21, 2020     https://doi.org/10.3892/mco.2020.1983
  • Pages: 230-236
  • Copyright: © Suwa et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aim of the present study was to evaluate the efficacy and safety of the new‑generation percutaneous microwave ablation (MWA) compared with the radiofrequency ablation (RFA) system for the treatment of hepatocellular carcinoma (HCC). A retrospective study was conducted from January 2014 to February 2019. A total of 44 patients and 52 nodules (mean tumor size, 17.2±4.9 mm) were treated with MWA, and 55 patients and 70 nodules (mean tumor size, 17.7±6.4 mm) were treated with RFA. After 4 days of treatment, the direct effects of ablation were assessed using dynamic CT, and after discharge, a follow‑up dynamic CT scan was performed every 3‑4 months. Treatment efficacy, complications and local recurrence were recorded. For MWA and RFA, the average number of CT sessions were 1.05±0.23 and 1.28±0.54, respectively, and the mean ablation times were 5.0±2.0 and 8.1±4.8 min. Following MWA and RFA, the ablation ranges that were evaluated with the axial images were 31.9±5.5 and 33.3±9.0 mm, respectively, in the long‑axis diameter and 27.6±5.3 and 23.4±6.8 mm, respectively, in the short‑axis diameter. The flatness ratios of the ablation regions were 0.13±0.09 and 0.29±0.14 (axial image) and 0.11±0.07 and 0.28±0.14 (coronal image), respectively. The rates of complete tumor necrosis were comparable. The complication rates were 13.6% (MWA) and 14.5% (RFA), which were not significantly different. The cumulative local recurrence rates were not significantly different between the two methods (one‑year recurrence rate, MWA: 6.91%, RFA: 5.17%). MWA was therefore indicated to be an effective treatment for HCC in respect to session number, treatment time and spherical ablation.
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March 2020
Volume 12 Issue 3

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APA
Suwa, K., Seki, T., Tsuda, R., Yamashina, M., Murata, M., Yamaguchi, T. ... Okazaki, K. (2020). Short term treatment results of local ablation with water‑cooled microwave antenna for liver cancer: Comparison with radiofrequency ablation. Molecular and Clinical Oncology, 12, 230-236. https://doi.org/10.3892/mco.2020.1983
MLA
Suwa, K., Seki, T., Tsuda, R., Yamashina, M., Murata, M., Yamaguchi, T., Nishio, A., Okazaki, K."Short term treatment results of local ablation with water‑cooled microwave antenna for liver cancer: Comparison with radiofrequency ablation". Molecular and Clinical Oncology 12.3 (2020): 230-236.
Chicago
Suwa, K., Seki, T., Tsuda, R., Yamashina, M., Murata, M., Yamaguchi, T., Nishio, A., Okazaki, K."Short term treatment results of local ablation with water‑cooled microwave antenna for liver cancer: Comparison with radiofrequency ablation". Molecular and Clinical Oncology 12, no. 3 (2020): 230-236. https://doi.org/10.3892/mco.2020.1983