Pheochromocytoma is an adrenal gland tumor that secretes catecholamines. At present, pheochromocytoma can be diagnosed by either elevated urinary metanephrines or plasma metanephrines. We present a case of pheochromocytoma with discordant urine and plasma metanephrines, that highlights the importance of measuring plasma metanephrines when attempting to establish a diagnosis.
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Patel et al. (2024) studied this question.
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