Radiofrequency Ablation for Management of Benign/Indeterminate Thyroid Nodules and Low Risk Papillary Thyroid Cancers

To track the outcomes of patients who have been treated with RFA and its long-term effectiveness, and to learn more about the quality of life of patients who have received RFA in this study.

Eligibility Criteria 1. Participants scheduled to undergo ultrasound-guided RFA for the following conditions: benign thyroid nodules, indeterminate thyroid nodules, low-risk DTC, and recurrent PTC 2. Participant is over 18 years and is either not a surgical candidate or has declined surgery. 3. Capable and willing to provide written informed consent 4. Participant has one of the following diagnoses: * Biopsy-proven benign thyroid nodules causing compressive and/or cosmetic symptoms who are requesting treatment, * Biopsy-proven indeterminate nodules (AUS or follicular neoplasm) * Papillary thyroid carcinoma (PTC) without metastasis * Locally recurrent thyroid cancer (\< 2 cm). Exclusion Criteria 1. Participants meeting any of the following criteria will be excluded: 2. Participants considered unsuitable for RFA by the treating physician