He was discharged on the 13th postoperative day without obvious complications related to parathyroidectomy, such as recurrent laryngeal nerve palsy or hypocalcemia with a decreased PTH level (intact PTH: 81.6 pg/mL, phosphorus: 4.4 mg/dL, and corrected calcium: 8.8 mg/dL). The gene discussed is PTH; the disease is Hypocalcemia.