Table 1. Short-Term Results of Thermal Ablation for Benign Thyroid Nodules.

	Jeong et al. [2]	Spiezia et al. [8]	Dobnig and Amrein [9]	Jung et al. [10]
Year	2008	2009	2018	2018
Patient number	236	66	222	276
Study design	Retrospective Single center	Prospective Single center	Prospective Single center	Prospective Multicenter
Country	Korea	Italy	Austria	Korea
Modality	RFA	RFA	RFA	RFA
Device	Internally cooled	Umbrella	Thyroid-dedicated Internally cooled	Thyroid-dedicated Internally cooled
Mean volume, mL	6.1	21.1	14.1	14.2
Follow-up, months	1–41 (12.3)	1–24	12	12
12-month VRR, %	84.1	79.4	80.0	80.4

RFA = radiofrequency ablation, VRR = volume reduction ratio