Endocrinology Question 32 Instructor

In a patient with hypercalcemia and an asymptomatic renal stone, how would you differentiate various causes of hypercalcemia?

Serum calcium PTH Urine calcium excretion
Primary hyperparathyroidism High High High
Familial Hypocalciuric hypercalcemia High High Low
Lithium use Normal/High High High
Hydrochlorothiazide use Normal/High Normal Low

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