Homovanillic acid + Vanillylmandelic acid, 24 hour urine

Alphabetical Test listing

Homovanillic acid + Vanillylmandelic acid, 24 hour urine-994

  
Homovanillic acid + Vanillylmandelic acid, 24 hour urine
  
994
  
LAB994
  
MSO
  
HVA + VMA, 24 hr urine
  
  • Diagnose pheochromocytoma (VMA).
  • HVA is often excreted in excess amounts by neuroblastomas, ganglioneuroblastomas, pheochromocytomas, and in Riley-Day syndrome.
  

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

  
Urine, 24 hr
  
8.0 mL aliquot of a 24 hour collection
  
2.0 mL aliquot of a 24 hour collection
  
  
  1. Measure and record total urine volume
  2. Mix well
  3. Transfer an 8 mL aliquot to a Transfer vial/tube with cap - 12mL (LabCorp)
  4. Label container with patient's name, date and time collection started, and date and time collection finished

 

  
  • Total volume
  
Ambient (preferred) - 14 days
 
Refrigerated - 14 days

Frozen - 14 days
  
LabCorp Burlington (329656): R-NX
  
Mo - Fr
  
2 - 3 days
  

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

  
HVA: 0.0 - 10.0 mg/24 hrs
VMA: 0.0 - 7.5 mg/24 hrs
  
83150
84585
  
Result 9624-8
  
05/29/2019
  
05/29/2019