How long you can live at the age of 50 with thyroid cancer is uncertain, and it has a lot to do with the type of cancer, the treatment method and the stage of the disease. 1. Cancer type: Thyroid cancer is divided into papillary thyroid cancer, follicular thyroid cancer, medullary thyroid cancer and undifferentiated cancer. Among them, papillary thyroid cancer and follicular thyroid cancer have better prognosis and patients may live for a long time, medullary thyroid cancer may have lymph node invasion and blood line metastasis, and its prognosis is relatively poor, and if it is undifferentiated cancer, the mortality rate of this kind of cancer is particularly high, and the median survival time is only 7~10 months. 2. Treatment method: the prognosis of thyroid cancer is also related to the treatment method, if surgery is carried out as early as possible, the survival rate will be higher. If surgery is not possible, only radiotherapy and chemotherapy can be carried out, the prognosis will be worse. 3. Disease staging: Generally speaking, the earlier the thyroid cancer, the better the prognosis is; if metastasis occurs, the prognosis is worse. If thyroid cancer is diagnosed, it should be treated as early as possible. Keeping an optimistic attitude and active treatment can improve the cure rate and prolong the life.