How long thyroid cancer can live mainly depends on the type of pathology, treatment and individual patient’s condition, which should be analyzed on a case-by-case basis and cannot be generalized. Generally speaking, most patients with thyroid cancer have a good prognosis and can survive for a long time if they are diagnosed and treated with surgery as soon as possible. However, if the patient has lymph node invasion and blood metastasis, or the pathological type is undifferentiated carcinoma, the prognosis is relatively poor and the chance of recurrence is high after treatment, and the survival period varies from person to person. For example, undifferentiated thyroid cancer is less common, but has a high mortality rate and a median survival of only six months to one year. Therefore, it is recommended that patients with thyroid cancer should actively consult the medical oncology department of a regular hospital for a clear diagnosis and active treatment. After treatment, patients should also insist on regular review to detect signs of recurrence or metastasis in time so that corresponding treatment measures can be taken in time to improve the cure rate and prolong the survival period.