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What is The MOST sensitive 24 hour urinary biochemical test to suggest pheochromocytoma among the following is and explain in detail?
Table 343-2 Biochemical Tests Used for Pheochromocytoma Diagnosis Diagnostic Method Sensitivity Specificity 24-h urinary tests Vanillylmandelic acid ++ ++++ Catecholamines +++ +++ Fractionated metanephrines ++++ ++ Total metanephrines +++ ++++ Ref: Harrisons Principles of Internal Medicine, 18th Edition, Page 2963