**Question:** In hyperparathyroidism all seen except -

A. Hypocalcemia
B. Renal stones
C. Paresthesia
D. Fatigue

**Core Concept:** Hyperparathyroidism is a condition characterized by the overproduction of parathyroid hormone (PTH) from the parathyroid glands, leading to increased calcium levels in the blood (hypercalcemia) due to the stimulation of calcium release from bones, increased calcium reabsorption in kidneys, and decreased calcium absorption in the intestines.

**Why the Correct Answer is Right:** Among the given options, fatigue is not specifically related to hyperparathyroidism. Fatigue can be present in many conditions, making it a nonspecific symptom. In contrast, hypocalcemia, renal stones, and paresthesia are direct consequences of hypercalcemia in hyperparathyroidism.

**Why Each Wrong Option is Incorrect:**

A. Hypocalcemia (low blood calcium levels): While fatigue can coexist with hypocalcemia, it is not the primary consequence of hypocalcemia. Hypocalcemia results from insufficient calcium absorption from the gut, impaired calcium release from bones, or decreased renal calcium reabsorption.

B. Renal stones (calcium oxalate or urate stones): This is a consequence of hypercalcemia, not fatigue. Hypercalcemia increases urine supersaturation, promoting the formation of stones.

C. Paresthesia (tingling or numbness): This is a direct result of hypercalcemia in hyperparathyroidism. Hypercalcemia can lead to nerve irritation, causing symptoms such as paresthesia.

**Clinical Pearl:** In hyperparathyroidism, fatigue may be present, but it is not a specific consequence of the condition. Instead, focus on the more specific findings like hypocalcemia, renal stones, and paresthesia to help differentiate between hyperparathyroidism and other causes of hypercalcemia.