Laboratory tests showed increased PTH levels of up to 1,718 pg/ml (15–65) and significant hypercalcemia of 4.13 mmol/L (2.15–2.55) (Graph 1), with eGFR (CKD-EPI) at 27 ml/min/1.73 m2. The gene discussed is PTH; the disease is hypercalcemia disease.