Surgery Which of the following is used to differentiate between hypercalcemia of malignancy from primary hyperparathyroidism? A Hydrocoisone suppression test B Glucose challenge test C 24 hour urine calcium measurement D Percentage of ionized calcium 💡 Explanation Which of the following is used to differentiate between hypercalcemia of malignancy from primary hyperparathyroidism? ✓ Correct Answer: A. Hydrocoisone suppression test