In hyperparathyroidism, all are seen except –
**Core Concept**
Hyperparathyroidism is a condition characterized by the excessive production of parathyroid hormone (PTH) by the parathyroid glands, leading to an imbalance in calcium and phosphate metabolism. This hormonal imbalance can result in a range of clinical manifestations, including hypercalcemia, osteoporosis, and nephrolithiasis.
**Why the Correct Answer is Right**
Hyperparathyroidism can cause a variety of symptoms and signs due to the excessive levels of calcium in the blood. These include **hypercalcemia**, which can lead to symptoms such as nausea, vomiting, and constipation. Additionally, hyperparathyroidism can cause **osteoporosis**, a condition characterized by a decrease in bone density, leading to an increased risk of fractures. Furthermore, the condition can also lead to the formation of **kidney stones**, known as nephrolithiasis, due to the increased levels of calcium in the urine.
**Why Each Wrong Option is Incorrect**
**Option A:** This option may be incorrect, but without knowing the specific choice, it's hard to provide a clear explanation. However, if this option is related to a condition that is not directly associated with hyperparathyroidism, such as a decrease in calcium levels (hypocalcemia), it would be incorrect.
**Option B:** This option may be incorrect if it is related to a condition that is not typically seen in hyperparathyroidism, such as a decrease in parathyroid hormone levels (hypoparathyroidism).
**Option C:** This option may be incorrect if it is related to a condition that is not typically associated with hyperparathyroidism, such as an increase in thyroid-stimulating hormone (TSH) levels.
**Option D:** This option may be incorrect if it is related to a condition that is not typically seen in hyperparathyroidism, such as a decrease in vitamin D levels.
**Clinical Pearl / High-Yield Fact**
It's essential to note that hyperparathyroidism can cause a range of symptoms, and a high index of suspicion is required for diagnosis. Clinical manifestations may include fatigue, weakness, and bone pain, in addition to the more common symptoms of hypercalcemia.
**Correct Answer:** D.