Case List History Objectives Radiology Images Questions SURGICAL ENDOCRINOLOGY Case #5 - A 35 year old with recent onset of hypertension DISCUSSION QUESTIONS: 4.) What lab workup is needed? What findings are typical of pheochromocytoma? What findings are typical of aldosteronoma? Laboratory evaluation: Urinary catecholamines and metanephrines elevated in pheochromocytoma Hypokalemia and hypernatremia suggest aldosteronoma; serum aldosterone is elevated with low serum renin and an increased aldosterone:renin ratio. 24 hour urine for free cortisol and serum cortisol elevated in Cushing's syndrome
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