Thyroid cancer review blood test, mainly check thyroid function, coagulation function, tumor markers and so on. 1. Thyroid function: there are 5 items in total, mainly including total T3, total T4, free T3 (thyroxine), free T4 (tetraiodothyronine), TSH (thyroid stimulating hormone), through the results of these tests, we can understand whether there is any abnormality of thyroid function, and then according to the recovery of thyroid function, we can adjust the treatment plan appropriately. 2. Coagulation function: Thyroid cancer patients can observe the coagulation function through blood sampling, determine whether the patients have coagulation dysfunction, and analyze whether there is platelet drop, anemia and so on. 2. Tumor marker: through tumor marker screening, we can understand the control effect of thyroid cancer and analyze whether there is any growth of cancer cells. Tumor markers: Through tumor marker screening, we can know the control effect of thyroid cancer and analyze whether the cancer cells are growing or not. It is mainly analyzed through the diagnostic results of alpha-fetoprotein, carcinoembryonic antigen CA199, NSE and CA724. In addition to the above laboratory tests, thyroid cancer patients also need to check blood routine, blood biochemistry and other items on a regular basis to understand the patient’s physical condition, nutritional status and so on. In addition to blood tests, thyroid ultrasound is also needed to determine whether the swelling has increased or decreased, and then adjust the treatment plan with the diagnosis results, which should be carried out under the guidance of professional doctors.