There is no authoritative information on how long you can live with thyroid cancer over the age of 70, the exact survival time is related to the type of pathology, physical condition, treatment measures and other factors. Thyroid cancer is a kind of malignant tumor disease originated from the follicular epithelium of the thyroid gland. At present, there is no relevant authoritative information about how long thyroid cancer over 70 years old can live, and it needs to be based on specific circumstances. Therefore, the specific survival time has obvious individual differences, which is mainly related to the type of pathology, physical condition, treatment methods and other factors. The 5-year survival rate is commonly used to roughly assess the survival of patients with thyroid cancer. Thyroid cancer types can be divided into differentiated (including papillary, follicular), medullary and undifferentiated. According to authoritative data, the 5-year survival rate of differentiated thyroid cancer is about 93.6%; the 5-year survival rate of medullary thyroid cancer is about 68.75%; and the 5-year survival rate of undifferentiated thyroid cancer is about 16.81%. The prognosis of thyroid cancer mainly depends on early detection, early diagnosis and early treatment, so it is recommended that patients keep a positive and optimistic mindset and go for regular treatment as early as possible.