Effectiveness and Safety of Thermal Ablation in the Treatment of Primary Hyperparathyroidism: A Multicenter Study.

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To evaluate the effectiveness and safety of thermal ablation for primary hyperparathyroidism (pHPT).From January 2015 to March 2020, data pertaining to patients who received thermal ablation for pHPT at 4 centers were retrospectively analyzed. The median follow-up duration was 18.1months (IQR: 6.5-42.2 months). A cure referred to the reestablishment of normal values of serum calcium and intact parathyroid hormone (iPTH) throughout the entire follow-up period, at least more than 6 months. The technical success, effectiveness, and safety of treatment were analyzed.119 patients (mean age, 57.2 ± 16.3 years; 81 female) with 134 parathyroid nodules were enrolled. The mean maximum diameter of the parathyroid glands was 1.6 ± 0.9 cm. Ninety-six patients underwent microwave ablation (MWA), and 23 patients underwent radiofrequency ablation (RFA). The technical success rate was 98.3% and the cure rate was 89.9%. Significant differences were found in the maximum diameter between the cured patients and the patients who did not undergo ablation of the target lesions. Except the cases with pHPT nodules<0.6cm in diameter, the cure rate was 95%. There were no difference in cure rates at 6 months between the MWA and RFA (MWA vs. RFA, 90.6% vs. 87.0%; χ2=0.275, p = 0.699). The volume reduction rate of the ablation zone was 94.6% at 12 months. The complication rate was 6.7% (8/119). Except one patient with persistent voice impairment, other symptoms were spontaneously resolved within six months.Thermal ablation was effective and safe for pHPT.

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Authors: Ying Wei, Cheng-Zhong Peng, Shu-Rong Wang, Jun-Feng He, Li-Li Peng, Zhen-Long Zhao, Xiao-Jing Cao, Yan Li, Ming-An Yu