Parathyroid gland is an important endocrine gland in the human body mainly secreting PTH, which can act on the bone and kidney and regulate serum calcium level.17-19 It has been pointed out that PTH can effectively reflect the thyroid function of patients,20 and thyroidectomy can lead to potential insufficient PTH secretion after surgery.21 Poupak Fallahi et al.22 Also found that PTH detection after thyroid surgery can well predict hypocalcemia. The gene discussed is PTH; the disease is Hypocalcemia.