Topics:
Endocrinology • Bone and Calcium Disorders
What is the utility of an oral calcium loading test to differentiate FHH from secondary hyperparathyroidism due to low calcium intake?
The patient has very low urinary calcium despite calcium supplements, vitamin D used to be low now normal. Continues to have elevated PTH with normal calcium and phosphate.
Answer from: at Academic Institution
Both vitamin D deficiency and calcium deficiency can result in secondary hyperparathyroidism. Before entertaining the diagnosis of FHH, I would treat the patient with an adequate calcium intake of 1000 mg a day of elemental calcium preferably from dietary sources like dairy. Supplemental sources are...
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