<prompt> Most common cause of hypercalcemic crisis is :Parathyroid adenomaParathyroid hyperplasiaMalignancyPagets disease  <response>: A hypercalcaemiccrisisis an emergency situation with a severehypercalcaemia, generally above approximately 14 mgdL or 3.5 mmollThe most common cause is hypercalcemia of malignancy, although granulomatous diseases, previously undetected primary hyperparathyroidism, medication-induced hypercalcemia, and a few rarer causes may result in this endocrine emergency as well. Stepwise approach for management of Hypercalcemic crisis Step 1: Confirm the diagnosis. Step 2: Restore normal hydration - Through IV fluids200-500 mlhr of NS should be administered to maintain a urine output of 100 mlhr. Step 3: Use of loop diuretics to be limited to hypercalcemic crisis associated with hea failure or renal failure. Calcitonin or bisphosphonates-Preferred drugs for hypercalcemic management after restoring normal hydration with IV fluids. 