Homovanillic acid, 24-hour urine-994

Test info

  
Homovanillic acid, 24-hour urine
  
994
  
LAB994
  
MSO
  
HVA, 24-hour urine
  
  • Diagnose neuroblastoma, ganglioneuroblastoma, and pheochromocytoma
  • Follow course of tumor treatment

Specimen

  
  • Patient should avoid aspirin, disulfiram, reserpine, and pyridoxine, if possible, at least 48 hours prior to collection of the specimen.
  • Levodopa should be avoided for two weeks pior to collection.
  
Urine, 24-hr
  
4.0 mL aliquot of a 24-hour collection
  
1.0 mL aliquot of a 24-hour collection
  
  
  1. Measure and record total volume
  2. Mix well
  3. Transfer a 4mL 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
 
Freeze/thaw cycles - stable x3

Performance

  
LabCorp Burlington (120253): R-NX
  
Mo - Fr
  
7 days
  

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

Clinical and Interpretive info

  

0.0 - 10.0 mg/24 hours

Billing

  
83150
  
Result 11144-3

Tracking

  
05/29/2019
  
04/11/2022
  
03/31/2022