<prompt> Most common cause of hypercalcemia crisis is:Parathyroid adenomaParathyroid hyperplasiaCarcinoma breastPagets disease  <response>: Ans. c Carcinoma breastRef: Harrison 18e p 3106 MC cause of Hypercalcemia - Parathyroid adenoma MC cause of Hypercalcemic Crisis - Malignancy Cancer Breast is the MC cause 