VMA (Vanillylmandelic Acid), 24-Hour Urine with Creatinine
Also known as: Vanillymandelic Acid w/Creatinine, VMA, 24 Hr Urine w/Creatinine
Use
This test is used to measure the level of Vanillylmandelic Acid (VMA) in a 24-hour urine sample. VMA is a metabolite of catecholamines, and elevated levels may indicate pheochromocytoma, neuroblastoma, and other neuroendocrine tumors.
Special Instructions
Ensure complete urine collection over a 24-hour period. Acid is added to the collection container as a preservative.
Limitations
Results can be affected by certain medications, foods, and stress. Ensure patient adherence to pre-test preparation guidelines for accurate results.
Methodology
Mass Spectrometry
Biomarkers
Result Turnaround Time
3-5 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
24-hour collection
Minimum Volume
Not provided
Container
24-hour urine container with acid
Collection Instructions
Collect all urine over a 24-hour period.
Patient Preparation
Avoid certain foods and medications prior to collection.
Storage Instructions
Refrigerate during collection.
Causes for Rejection
Incomplete collection, incorrect preservative.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unstable |
| Refrigerated | Stable for 48 hours |
| Frozen | Stable for longer periods |