In primary hyperparathyroidism, which serum changes are expected?

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Multiple Choice

In primary hyperparathyroidism, which serum changes are expected?

Explanation:
In primary hyperparathyroidism, excess parathyroid hormone raises blood calcium while lowering phosphate. PTH causes calcium to be released from bone, increases renal reabsorption of calcium, and boosts production of active vitamin D to enhance gut calcium absorption. At the same time, it promotes phosphate excretion by the kidneys, reducing serum phosphate. The net result is higher calcium with lower phosphate, which matches the correct pattern.

In primary hyperparathyroidism, excess parathyroid hormone raises blood calcium while lowering phosphate. PTH causes calcium to be released from bone, increases renal reabsorption of calcium, and boosts production of active vitamin D to enhance gut calcium absorption. At the same time, it promotes phosphate excretion by the kidneys, reducing serum phosphate. The net result is higher calcium with lower phosphate, which matches the correct pattern.

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