What is the 5-year survival rate for advanced thyroid cancer? It needs to be determined according to the pathological type of thyroid cancer as well as its severity. Some 5-year survival rate can be above 90%, while some types of cancer have very poor prognosis. Generally speaking, papillary thyroid cancer and follicular thyroid cancer have a better prognosis, medullary thyroid cancer has a worse prognosis, and undifferentiated thyroid cancer has the worst prognosis, with a median survival time of only 7-10 months. The median survival time is only 7-10 months. The 5-year survival rate of papillary thyroid cancer can reach more than 90%, and the 5-year survival rate of patients with advanced thyroid cancer can reach about 90% if only local lymph node metastasis occurs, the corresponding lymph node dissection is done during the operation, and the patients are treated with iodine 131 after the operation. However, if thyroid cancer has metastases in other places, such as lungs and bones, the 5-year survival rate will be reduced accordingly, and according to statistics, it can reach about 70%. However, if undifferentiated thyroid cancer has metastasis in other places, the 5-year survival rate will be quite low, because undifferentiated thyroid cancer is highly malignant and has a high mortality rate.