Hypercalcemic crisis

A 52-year-old woman with a history of hypertension sustained a large left frontoparietal intracerebral hemorrhage resulting in right-sided flaccid paralysis complicated by acute respiratory failure status post tracheostomy for prolonged mechanical ventilation. She is transferred to the step-down intensive care unit for ventilator weaning. Serum calcium level returns elevated at 11.3 mg/dL with a serum albumin level of 2.8 g/dL. What is the most likely cause of her hypercalcemia and how should it be managed?

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