Thyroid cancer is the most important malignant tumor of the head and neck and can be divided into four types: papillary, follicular, undifferentiated and medullary carcinoma. The overall prognosis of the disease is good, such as the 10-year survival rate of papillary carcinoma is above 80%. However, since the age of onset of thyroid cancer is significantly younger than other tumors (the average age is around 38 years old), and it mostly occurs in young and middle-aged people in the golden period of their life, unregulated treatment will affect the generation of the patient and the quality of life in the latter half of his/her life. If a goiter is detected during a physical examination, it is important to see a head and neck surgeon as soon as possible for further examination. Especially when there are thyroid goiter with the following conditions, the possibility of thyroid cancer should be highly suspected: 1, male and child patients with single substantial nodule, the possibility of thyroid cancer is 50% greater, and vigilance should be raised. 2.The thyroid nodule suddenly increases in size in a short period of time. 3.Producing symptoms of compression and invasion, such as dyspnea, hoarseness, dysphagia and so on. 4, The swelling is hard and solid, and the surface is not flat. 5. The swelling has limited or fixed movement and does not move up and down with swallowing. 6.Enlarged lymph nodes in the neck. 7, Thyroid swelling or enlarged lymph nodes in the neck appear again after thyroid surgery. 8, Ultrasound suggests that the mass is ill-defined, the envelope is incomplete, the interior of the mass is inhomogeneous, there is abundant blood flow, fine gravel calcification, and there are papillary structures.