NEET PG Medical – 2018 – Question – 30
VMA is excreted in urine in which condition –
a) Alkaptonuria
b) Phenylketonuria
c) Pheochromocytoma
d) Diabetic ketoacidosis
Show Answer
Correct Answer – C
Answer: C. Pheochromocytoma
VMA is the end product of catabolism of catecholamines.
In pheochromocytoma and neuroblastoma there is excessive synthesis of catecholamines which causes enhanced synthesis of VMA and its excretion in the urine.
VMA is the urinary product of both epinephrine and norepinephrine.
It is a good screening test for pheochromocytoma, and is also used to diagnose and follow up neuroblastoma and ganglioneuroma.
