The MOST sensitive 24 hour urinary biochemical test to suggest pheochromocytoma among the following is
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
Vanillylmandelic acid
Fractionated metanephrines
Total metanephrines
Catecholamines