What are some common causes of hypercalcemia?
Hyperparathyroidism and malignancy represent about 90% of all cases of hypercalcemia. Other etiologies include:
• Granulomatous diseases
• Immobilization
• Medications: excessive vitamin D, vitamin A, lithium, Tamoxifen, etc.
• Milk-alkali (or calcium alkali) syndrome
• Endocrine: thyrotoxicosis, etc.
