Hypercalcemia is associated with all Except:
**Core Concept**
Hypercalcemia is a condition characterized by elevated levels of calcium ions in the blood, which can result from various pathophysiological mechanisms, including increased bone resorption, increased intestinal absorption, or decreased renal excretion of calcium. In this context, several conditions are known to cause hypercalcemia, but the question requires identifying the exception among the given options.
**Why the Correct Answer is Right**
Celiac disease is a chronic autoimmune disorder of the small intestine, primarily caused by sensitivity to gluten. While celiac disease can lead to various complications, such as osteoporosis and anemia, it is not typically associated with hypercalcemia. In fact, untreated celiac disease is more commonly associated with hypocalcemia due to malabsorption of calcium. The correct answer requires understanding the pathophysiology of celiac disease and its effects on calcium metabolism.
**Why Each Wrong Option is Incorrect**
**Option A:** Hyperparathyroidism is a condition characterized by excessive production of parathyroid hormone (PTH) by the parathyroid glands, leading to increased bone resorption and hypercalcemia. Therefore, it is a well-established cause of hypercalcemia.
**Option B:** Sarcoidosis is a systemic granulomatous disease that can cause hypercalcemia due to increased 1,25-dihydroxyvitamin D production by activated macrophages within granulomas, which stimulates intestinal calcium absorption.
**Option C:** Milk-alkali syndrome is a condition characterized by excessive intake of calcium and absorbable alkali, leading to hypercalcemia and metabolic alkalosis. It is a known cause of hypercalcemia.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that celiac disease is more commonly associated with hypocalcemia due to malabsorption of calcium and vitamin D. However, it is essential to consider the context and complications of celiac disease, such as osteoporosis, which can be a result of chronic malabsorption.
**Correct Answer:**
✓ Correct Answer: D. Celiac disease