Journal of Capital Medical University ›› 2023, Vol. 44 ›› Issue (6): 941-947.doi: 10.3969/j.issn.1006-7795.2023.06.006

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nalysis of factors related to the absorption rate of papillary thyroid microcarcinoma after ultrasound-guided radiofrequency ablation

Jia Xiaoxia, Chang Ying, Hou Wenying, Fu Ying, Zhang Huidan, Yang Jingchun*   

  1. Department of Ultrasound, Xuanwu Hospital, Capital Medical University, Beijing  100053, China
  • Received:2023-09-05 Online:2023-12-21 Published:2023-12-20
  • Supported by:
    This study was supported by Training Fund for Open Projects at Clinical Institutes and Departments of Capital Medical University(CCMU2023ZKYXY022).

Abstract: Objective  To explore the ultrasound and pathological factors related to the absorption rate of ultrasound-guided radiofrequency ablation(RFA) in the treatment of papillary thyroid microcarcinoma (PTMC).Methods  This study performed a retrospective analysis of patients with ultrasound-guided RFA for PTMC between December 2020 and March 2022. General information of patients was collected before RFA, and follow-up was performed at 1, 3, 6, 12 and 18 months after RFA to obtain changes in thyroid nodules volume. Taking the time when postoperative nodules reach 100%  volume reduction ratio (VRR) as the absorption rate evaluation index, univariate  χ2 test and Logistic regression were used to analyze the influencing factors of RFA treatment.Results  A total of 64 TNs in 56 patients reached 100% VRR 18 months after RFA, the mean VRR of nodules at 1, 3, 6, 12, and 18 months after RFA were 61.43%, 87.86%, 96.62%, 99.70% and 100%.Through the analysis of ultrasound features, it was found that the nodule volume greater than 0.08  mL and the RFA time longer than 130 s were associated with low absorption rate (100% VRR time greater than 12 months). PTMC patients with Bethesda grade Ⅲ have a lower rate of absorption than patients with Bethesda class Ⅴ/Ⅵ. In addition, PTMC patients with Hashimoto's thyroiditis are associated with low absorption rate. Logistic regression analysis showed that RFA was independent influencing factors affecting the rate of absorption after RFA in PTMC patients. Conclusion  Ultrasound features affecting the absorption rate of TNs by ultrasound-guided RFA include nodules volume,duration of RFA, Bethesda grade and Hashimoto's thyroiditis. RFA was independent factors of PTMC absorption rate after RFA.

Key words: ultrasound-guided radiofrequency ablation, papillary thyroid microcarcinoma, Bethesda grade, Hashimoto's thyroiditis

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