Whether thyroid cancer will endanger the patient’s life should be analyzed according to the specific type of thyroid cancer, early or late condition, and the size of the lesion, etc.: 1. If the patient with malignant tumor of thyroid has a large lesion, accompanied by trachea and esophagus compression, which will cause the patient’s serious respiratory and swallowing difficulties, the patient’s condition at this time will be life-threatening. 2. If the malignant tumor of thyroid belongs to advanced stage, accompanied by invasion and metastasis of systemic organs and lymph nodes, and belongs to undifferentiated type of thyroid cancer, the effect of surgical treatment is poor, the prognosis is extremely poor, and the patient’s life is also endangered.2. If the malignant tumor of thyroid belongs to the type of papillary carcinoma, and does not cause the invasion of lymph nodes and the metastasis of distant organs, and the volume of the lesion is <1cm, the patient can be completely eliminated after the surgical treatment. After surgical treatment, the tumor cells can be completely removed and better treatment effect can be achieved without endangering the patient's life.