Adrenal and Pancreas Hormones · Physiology

Pheochromocytoma is a tumor of the adrenal medulla that causes paroxysmal (sudden) episodes of:

  1. Extreme fatigue, bradycardia, and deep lethargy
  2. Severe hypertension, palpitations, and sweating
  3. Abdominal pain, hypoglycemia, and nausea
  4. Unexplained weight gain, edema, and puffiness
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Correct answer: Severe hypertension, palpitations, and sweating

Pheochromocytomas overproduce catecholamines (epinephrine/norepinephrine). This results in 'attacks' of sympathetic overactivity, including dangerously high blood pressure, rapid heart rate, and diaphoresis.

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