PTH and hyperphosphatemia: Laboratory findings showed severe hypocalcemia, with albumin correction, 1.15 mmol/L (normal range 2.2–2.6 mmol/L), hyperphosphatemia 2.76 mmol/L (normal range 0.87–1.45 mmol/L), while the serum PTH level was 320 pg/ml (normal range 15–65 pg/ml) with low calcium in the 24‐h urine collection 26.6 mg/24 h (normal range 100–300 mg/24 h), normal renal function, normal vitamin D (28 ng/ml, normal range 20–40 ng/ml), and normal serum magnesium 0.82 mmol/L (normal range 0.7–1.05 mmol/L).