True about adrenal pheochromocytoma is
**Core Concept**
Adrenal pheochromocytoma is a rare, catecholamine-secreting tumor originating from the chromaffin cells of the adrenal medulla. This condition is characterized by excessive production of epinephrine (adrenaline) and norepinephrine, leading to various systemic effects.
**Why the Correct Answer is Right**
The correct answer is related to the diagnosis and management of adrenal pheochromocytoma. These tumors are often diagnosed using imaging techniques such as CT or MRI scans, which can help identify the tumor's location and size. The correct answer is likely related to the use of imaging modalities in diagnosing adrenal pheochromocytoma.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because pheochromocytomas are typically benign, but they can be malignant in rare cases. However, the question may not be asking about the malignancy rate.
**Option B:** Incorrect because pheochromocytomas are not caused by a viral infection. They are usually sporadic or part of a genetic syndrome.
**Option C:** Incorrect because pheochromocytomas are not primarily caused by a deficiency of catecholamines. Instead, they are caused by an overproduction of catecholamines.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that patients with adrenal pheochromocytoma are at risk of developing hypertensive crises, cardiac arrhythmias, and other life-threatening complications. Therefore, it's crucial to manage these patients in a controlled environment, and to avoid sudden changes in posture or stress.
**Correct Answer:** A.