How do you prepare for a Vanillylmandelic acid test?
The patient should not consume any foods or fluids containing vanilla or licorice. The patient should avoid self-prescribed medications (especially aspirin) and prescribed medications (especially pyridoxine, levodopa, amoxicillin, carbidopa, reserpine, and disulfiram) for 2 wk before testing and as directed.
How is a VMA test performed?
This test measures the amount of VMA that is passed into the urine, typically over a 24-hour period, to detect excess epinephrine and norepinephrine. It is used to detect tumors called neuroblastomas and other neuroendocrine tumors.
What is the VMA test used for?
Vanillylmandelic acid (VMA) and other catecholamine metabolites such as homovanillic acid (HVA) measurement in urine are used for screening children for catecholamine-secreting tumors such as neuroblastoma and other neural crest tumors and monitoring those who have had treatment for these tumors.
What is the normal range of VMA?
Normal excretion of VMA is approximately 20 μmol/24 hours [52] with a range between 4 and 35 μmol/24 hours [1].
What can you not eat on a 24-hour urine test?
To the best extent possible, avoid using vitamins, coffee, alcoholic beverages, salt and vanilla-containing foods for at least 24 hours before you start collecting the 24-hour urine and during the entire collection period.
Why do I need a 24-hour urine test?
A 24-hour urine collection helps diagnose kidney problems. It is often done to see how much creatinine clears through the kidneys. It’s also done to measure protein, hormones, minerals, and other chemical compounds.
What is VMA and its diagnostic value?
Vanillylmandelic acid (VMA), a metabolic by-product of norepinephrine and epinephrine, can be used to detect neuroblastoma and other tumors of neural crest origin.
What causes high VMA?
Clinical Information Vanillylmandelic acid (VMA) and other catecholamine metabolites (homovanillic acid: HVA and dopamine) are typically elevated in patients with catecholamine-secreting tumors (eg, neuroblastoma, pheochromocytoma, and other neural crest tumors).
What causes high VMA levels?
How much water should I drink for 24-hour urine collection?
The normal range for 24-hour urine volume is 800 to 2,000 milliliters per day (with a normal fluid intake of about 2 liters per day).
What is the vanillylmandelic acid (VMA) test?
The vanillylmandelic acid (VMA) test is primarily used to detect and rule out tumors called neuroblastomas in children with an abdominal mass or other symptoms suggestive of the disease.
What is vanillylmandelic acid used for?
Vanillylmandelic acid (VMA) and other catecholamine metabolites such as homovanillic acid (HVA) measurement in urine are used for screening children for catecholamine-secreting tumors such as neuroblastoma and other neural crest tumors and monitoring those who have had treatment for these tumors.
What is the normal range of vanillylmandelic acid in urine?
Vanillylmandelic Acid – per 24h. 18 years and older. 0.0-7.0 mg/d. The VMA-to-creatinine ratio will be reported when the patient is under 18 years, the urine collection is random or other than 24 hours, or the urine volume is less than 400 mL/24 hours.
What is a homovanillic acid (HVA) test?
It may be ordered along with an homovanillic acid (HVA) test to help diagnose a neuroblastoma, to monitor the effectiveness of treatment, and to monitor for neuroblastoma recurrence.