Thyroid CancerThyroid cancer with several enlarged lymph nodes is mainly treated with surgical therapy, combined with radiotherapy and exogenous thyroxine replacement therapy after surgery as appropriate. It is necessary to formulate individualized comprehensive treatment plan according to different conditions of patients. 1. For patients with low-risk differentiated thyroid cancer, surgery and postoperative exogenous thyroxine replacement therapy or thyroid hormone suppression therapy are generally sufficient. 2. For patients with high-risk differentiated thyroid cancer with distant metastasis, surgery, postoperative iodine¹³¹ therapy and postoperative thyroid hormone suppression therapy are the main treatment modes. 3. For non-surgically resectable localized lesions, local radiofrequency ablation or external radiotherapy can be considered. 4. The treatment of medullary thyroid carcinoma should be based on surgical treatment, and thyroid hormone suppression therapy is not needed, but thyroxine replacement therapy is needed. 5. For undifferentiated thyroid cancer, if there is no distant metastasis and airway obstruction, the treatment modality of external radiotherapy + surgery or surgery + external radiotherapy can be preferred. The role of surgery is mainly to release airway obstruction (tracheotomy) and try to resect the tumor as much as possible when conditions permit. Thyroid cancer with several enlarged lymph nodes requires regular follow-up after systemic chemotherapy.