The life expectancy of thyroid cancer patients is related to the type of pathology, clinical stage, treatment effect, etc. If it is the type of pathology with better prognosis, early detection and early treatment, its life expectancy can generally reach 30 years and above. Thyroid cancer can be divided into papillary thyroid cancer, follicular thyroid cancer, medullary thyroid cancer, and undifferentiated thyroid cancer. Generally speaking, papillary thyroid cancer and follicular thyroid cancer are less malignant, and their life expectancy can be comparable to that of a normal person if they are operated as early as possible in the early stage of the cancer without metastasis. In addition, medullary thyroid carcinoma and undifferentiated thyroid carcinoma are more malignant, and even if they are treated as early as possible, their prognosis is relatively poor and they are more prone to recurrence, and their five-year survival rate is generally less than 30%. It is worth noting that, once any pathological type of cancer enters the middle or late stage and lymphatic or blood metastasis occurs, its treatment difficulty will increase, and its prognosis will generally deteriorate, affecting its life expectancy. Therefore, thyroid cancer should be detected and treated early to maximize its survival time. Once thyroid cancer is diagnosed, go to regular hospitals for treatment immediately.