From the thyroid gland alone, there is no problem. It should be noted whether long-term hypothyroidism affects cardiopulmonary function. If the patient can climb four flights of stairs independently, there is basically no problem. Breast cancer surgery has little effect on the whole body. In fact, I have turned on all pacemakers, bypass patients and renal failure patients undergoing dialysis. As long as the anesthesia is guaranteed, the operation is no problem.