Clinical Features
- Most cases: Asymptomatic (unlike primary hyperparathyroidism)
- Hypercalcaemia
- Hypocalciuria ( Ca excretion rate < 0.02 mmol/L).
- Normal to high PTH (CaSR mutation causes the parathyroid glands to be less sensitive to serum calcium, resulting in normal to high PTH despite elevated serum calcium)
- Hypermagnesaemia
- Green colored urine
Read more about this topic: Familial Hypocalciuric Hypercalcemia
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