Which of the following urinary metabolites are most sensitive for diagnosis of pheochromocytomas: (A) VMA, (B) Metanephrines, (C) 5HIAA, (D) 5HTP
Answer is B. Answer is B (Metanephrines): The most sensitive test for diagnosis of pheochromocytomas is measurement of fractionated metanephrines in urine and free metanephrines in plasma.