Electrolytes, including potassium, sodium, and chloride, were normal, but there was severe hypocalcemia (4.8  mg/dL, normal range 8.5–10.5 mg/dL) and hyperphosphatemia (4.7  mg/dL, normal range 2.5–4.5 mg/dL), low 25 (OH) vitamin D (15  ng/mL, normal range 30–70  ng/mL), with a decrease in parathormone (PTH) level (4 pg/mL, normal range 14–65 pg/mL) and normal alkaline phosphatase (ALP) level (62 IU/L, normal range 40–130 IU/L). The gene discussed is PTH; the disease is hyperphosphatemia.