Pheochromocytoma causes paroxysmal hypertension by secreting:
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Correct answer: Catecholamines
Pheochromocytoma is a tumor of the adrenal medulla chromaffin cells that secretes catecholamines (epinephrine and norepinephrine). This leads to episodes (paroxysms) of severe hypertension, palpitations, and headaches.
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