Vanillylmandelic acid, 24 hour urine

Alphabetical Test listing

Vanillylmandelic acid, 24 hour urine-13489

  
Vanillylmandelic acid, 24 hour urine
  
13489
  
LAB13489
  
VMA
  
3-Methoxy-4-hydroxymandelic acid, 24-hour urine
VMA
VMA, 24-hour urine
  

Diagnose pheochromocytoma.

VMA is of value for evaluation of hypertension, diagnose and follow up neuroblastoma, ganglioneuroma, and ganglioneuroblastoma.

Most neuroblastoma patients excrete excess HVA in 24-hour collections. If VMA and HVA are both used in work-up, up to 80% of all cases will be detected.

  

Patient should avoid salicylates, caffeine, phenothiazine, and antihypertension agents, as well as coffee, tea, chocolate, fruit (especially bananas and any vanilla containing substances) for 72 hours prior to collection.

  
Urine, 24 hr
  
4 mL aliquot from a 24 hr urine collection
  
1.0 mL aliquot from a 24 hr urine collection
  
  
  1. Measure and record total urine volume.
  2. Mix well
  3. Transfer a 4mL aliquot to a Transfer vial/tube with cap - 12mL (LabCorp)
  4. Label the aliquot tube with thepatient's name, date and time collection started, and date and time collection completed.
  

Transfer vial/tube with cap - 12mL (LabCorp)

  
  

Ambient (preferred) - 7 days

Refrigerated - 14 days

Frozen - 14 days

  
LabCorp Burlington (004143): R-LC
  
Mo - Fr
  
3 - 5 days
  

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

  

0.0 - 7.5 mg/24 hours

  
84585
  
Result 9624-8
  
04/11/2019
  
05/20/2019