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HelpTest Code UVMAR Vanillylmandelic Acid (VMA), Random, Urine
Reporting Name
Vanillylmandelic Acid, Random, UUseful For
Screening children for catecholamine-secreting tumors with a random urine collection when requesting vanillylmandelic acid only
Supporting a diagnosis of neuroblastoma
Monitoring patients with a treated neuroblastoma
Performing Laboratory
Mayo Medical Laboratories in Rochester
Specimen Type
UrineSpecimen Required
Container/Tube: Plastic, 10-mL urine tube (T068)
Specimen Volume: 5 mL
Collection Instructions:
1. Collect a random urine specimen.
2. Adjust the random urine pH to a level between 1 and 5 by adding 50% acetic acid dropwise and checking the pH.
Additional Information:
1. Patient's age is required.
2. Administration of L-dopa may falsely increase vanillylmandelic acid results; it should be discontinued 24 hours prior to and during collection of specimen.
Specimen Minimum Volume
2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Refrigerated (preferred) | 28 days |
| Frozen | 180 days |
Reference Values
<1 year: <25.0 mg/g creatinine
1 year: <22.5 mg/g creatinine
2-4 years: <16.0 mg/g creatinine
5-9 years: <12.0 mg/g creatinine
10-14 years: <8.0 mg/g creatinine
≥15 years (adults): <7.0 mg/g creatinine
Day(s) and Time(s) Performed
Monday through Friday; 8 a.m.
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
84585
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| VMAR | Vanillylmandelic Acid, Random, U | 3124-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 60274 | Vanillylmandelic Acid, Random, U | 3124-5 |
Reject Due To
|
Hemolysis |
NA |
|
Lipemia |
NA |
|
Icterus |
NA |
|
Other |
NA |
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Forms
If not ordering electronically, complete, print, and send an Oncology Test Request Form (T729) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/oncology-request-form.pdf)