Thyroid cancer is divided into papillary carcinoma, follicular carcinoma, medullary carcinoma, and undifferentiated carcinoma. The prognosis of papillary and follicular carcinoma of the thyroid (differentiated carcinoma) is relatively good, with few distant metastases and a 5-year survival rate of more than 90%, but very few differentiated carcinomas of the thyroid will develop bone metastases, which is a more advanced condition, and patients’ survival and prognosis are greatly affected, and about half of the patients will die within 5 years, especially The survival of patients with bone metastases is significantly lower than that of patients with metastases from other sites.