Thyroid cancer is a common malignant tumor of the head and neck. Generally, thyroid cancer needs to be decided by the size of the tumor and pathological type whether to be completely or semi-excised, as follows: 1. 2. If the mass is larger and has infiltrative manifestation, total thyroid excision is needed, including bilateral, left and right thyroid gland, as well as the thyroid gland in the isthmus, and lymph node dissection in the neck is also needed. If the number of lymph node metastases in the neck is relatively large, postoperative treatment with iodine-131 therapy is required.