To evaluate the long-term outcomes of ultrasound-guided thermal ablation for recurrent thyroid cancer

To evaluate and predict the long-term outcomes of ultrasound-guided thermal ablation for recurrent thyroid cancer by a multicenter study

Inclusion Criteria:

1. patient received thyroidectomy for thyroid cancer
2. recurrent lesions were pathologically proven to be malignant by core-needle biopsy or fine needle aspiration
3. no evidence of distant metastases.
4. follow-up period ≥12 months

Exclusion Criteria:

1. coagulation disorder, serious heart, respiratory, liver, or renal failure
2. dysfunction of the vocal cord on the opposite side

patients with recurrent thyroid cancer