Malignant thyroid, also called thyroid cancer, is the most common type of thyroid malignancy. The difference lies in the differentiated tissue cells, which are divided into papillary, follicular and undifferentiated thyroid cancer. Patients found to have malignant tumors should first consider surgical resection, and if the situation is serious, local lymph node dissection can be carried out if necessary, and radiation therapy can be carried out when pathological metastasis occurs. Papillary carcinoma is the most common one, this kind of papillary thyroid cancer, the degree of malignancy is still relatively low among all the tumors, and with early treatment for it, the survival rate of patients is still very high, at least within 5 years.