Table 1.
Laboratory results.
| Investigations | Level | Reference range | |
|---|---|---|---|
| Corrected calcium (mmol/L) | 2.65 | 2.2–2.6 mmol/L | |
| PTH (pmol/L) | 9.5 | 1.3–9.3 pmol/L | |
| PO4 (mmol/L) | 0.7 | 0.8–1.5 | |
| Vit D (nmol/L) | 99 | Optimal: >70 nmol/L | |
| eGFR (mL/min/1.73 m2) | 57 | 85–125 mL/min | |
| Urine Ca-Cr | 0.71, 0.86, and 0.73 |
|
Indicative of increased calcium excretion based on body weight of 50 kg |
| FE-Ca (%) | 2.58 | ||
| Urine calcium (mmol/24 hour) | 7.16 | ||
PTH: parathyroid hormone; PO4: phosphate; Vit D: 25-hydroxyvitamin D; eGFR: estimated glomerular filtration rate; urine Ca-CR: urinary calcium-to-creatinine ratio; FHH: familial hypocalciuric hypercalcaemia; FE-Ca: fractional excretion of calcium. Bold signifies blood levels outside of the normal reference range.