The most reliable test in the diagnosis of pheochromocytoma is
Correct Answer: 24 hour urinary metanephrine
Description: Pheochromocytomas are neoplasms of chromaffin cells,which synthesize and release catecholamines. The lab diagnosis of this condition is based on demonstration of increased urinary excretion of free catecholamines and their metabolites; vanilylmandelic acid and metanephrines. (ref:ROBBINS Text book of pathology
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Pathology
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