According to the current guidelines, as long as medullary thyroid cancer is diagnosed, total bilateral thyroidectomy is recommended, not partial excision. Thirdly, medullary thyroid cancer is generally not recommended to be treated with iodine 131 after surgery, which is not very useful for medullary thyroid cancer. Therefore, the amount of this drug should be less after surgery, and it is enough to maintain the normal function of the thyroid gland.