Parathyroid Hormone and the Hypercalcemia of Immobilization

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Abstract
Serial measurements of serum calcium and immunoreactive parathyroid hormone (PTH) were performed in two young patients with hypercalcemia of immobilization. Serum PTH was elevated in both patients. With mobilization, both serum PTH and serum calcium returned to normal levels and remained so during six months of follow-up. The hyperparathyroidism of immobilization is an unexplained, reversible disorder that should be treated by medical measures and aggresive attempts at early mobilization.