Surgery is applied in the treatment of patients with thyroid cancer as a result of biopsy. In surgery, it is essential to remove all thyroid tissue. The type of surgery is determined according to the spread of thyroid cancer, for example, after spread to the lymph nodes, it may be necessary to remove all the lymph nodes in the neck called modified radical neck dissection. If the cancer is limited only to the thyroid tissue, it is sufficient to remove the entire thyroid.