Patients with thyroid cancer can be found to have abnormalities in zone 6 lymph nodes through preoperative ultrasound, locally enhanced CT or MRI. If patients are found to have obvious metastatic tendency preoperatively, fine needle aspiration of the thyroid gland can be performed to clarify the diagnosis. If the patient is diagnosed with zone 6 lymph node metastasis, then intraoperative zone 6 lymph node dissection is required. Clinically, zone 6 is the pre-tracheal and paratracheal lymph nodes and is located below the thyroid gland. In addition to total thyroidectomy, the patient needs to have the pre-tracheal and paratracheal lymph nodes of the thyroid gland cleared during surgery to remove as many abnormal lymph nodes as possible. Postoperatively, patients can be observed for metastases through pathology. Metastases in zone 6 lymph nodes increase the possibility of metastases in other areas of the patient, such as lateral cervical lymph node metastases. If the patient has lateral neck metastasis, lateral neck lymph node dissection surgery is required.