Laboratory and imaging studies revealed hypercalcemia with serum calcium of 2.8 mmol/L, low phosphorus (1.38 mmol/L), low parathyroid hormone (PTH of 0.73 pmol/L), low PTH-related peptide, low vitamin D levels, and negative serum and urine protein electrophoresis. The gene discussed is PTH; the disease is Hypercalcemia.