Some studies showed that low postoperative PTH level was predictive of postthyroidectomy hypocalcemia, as an independent predictor or in combination with low preoperative vitamin D. Soares et al. prospectively evaluated 47 patients who were undergoing total thyroidectomy and reported that postoperative hypocalcemia was significantly associated with low postoperative PTH level [19]. The gene discussed is PTH; the disease is Hypocalcemia.