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Efficacy and safety of cooled and uncooled microwave ablation for the treatment of benign thyroid nodules: a systematic review and meta-analysis

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Abstract

Purpose

To evaluate the effectiveness and safety of microwave ablation (MWA), including cooled MWA (cMWA) and uncooled MWA (uMWA), for the treatment of benign thyroid nodules (BTNs).

Methods

The databases of MEDLINE, EMBASE and Cochrane library were searched up to 3 Jun, 2018. In this meta-analysis, data of volume reduction rates (VRRs) at the 3-, 6- and 12-month follow-up, and complications are obtained to evaluate the effectiveness and safety of cMWA and uMWA for the treatment of BTNs.

Results

Nine studies involving 1461 patients with 1845 BTNs were included. The pooled VRR at the 3-month follow-up after MWA therapy reached 54.3% (95% CI: 45.3–63.3%, I2 = 97.6%), 73.5% (95% CI: 66.7–80.3%, I2 = 94.9%) at the 6-month follow-up, and 88.6% (95% CI: 84.9–92.4%, I2 = 92.7%) at the 12-month follow-up. The pooled proportions of overall, major and minor complications were 52.4% (95% CI: 29.8–74.9%; I2 = 99.5%), 4.8% (95% CI: 2.7–7.0%; I2 = 55.9%) and 48.3% (95% CI: 31.2–65.4%; I2 = 99.7%). Both cMWA and uMWA achieved similar pooled VRR at the 3-month follow-up (58.4 vs 45.3%, P = 0.07) and pooled proportion of major complications (4.9 vs 5.0%, P = 0.49), while uMWA had higher pooled proportions of overall and minor complications than cMWA (97.8 vs 29.7%, P < 0.01; 97.8 vs 21.0%, P < 0.01), with more patients suffering pain and skin burn after uMWA (100 vs 5.5%, P < 0.01; 47.2 vs 0.2%, P < 0.01).

Conclusion

MWA is an effective treatment modality for BTNs. When considering the patient’s comfort, cMWA would be a more preferable procedure with less complications.

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Authors and Affiliations

  1. Department of Medical Ultrasonics, Guangdong Province Key Laboratory of Hepatology Research, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China

    Bo-wen Zheng, Jin-fen Wang, Jin-xiu Ju, Tao Wu, Ge Tong & Jie Ren

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  1. Bo-wen Zheng
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Correspondence to Jie Ren.

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Zheng, Bw., Wang, Jf., Ju, Jx. et al. Efficacy and safety of cooled and uncooled microwave ablation for the treatment of benign thyroid nodules: a systematic review and meta-analysis. Endocrine 62, 307–317 (2018). https://doi.org/10.1007/s12020-018-1693-2

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