Homovanillic acid, 24-hour urine

Alphabetical Test listing

Homovanillic acid, 24-hour urine-994

Test name:

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

HVA, 24-hour urine

Useful for:

Diagnose neuroblastoma, ganglioneuroblastoma, and pheochromocytoma
Follow course of tumor treatment

Patient preparation information:

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.

Specimen type:

Urine, 24-hr

Collection container:

24-hr urine collection container, no additive

Volume:

4.0 mL aliquot of a 24-hour collection

Minimum volume:

1.0 mL aliquot of a 24-hour collection

Collection instructions:

How to collect a 24-hr urine sample

Processing instructions:

Measure and record total volume
Mix well
Transfer a 4mL aliquot to a Transfer vial/tube with cap - 12mL (LabCorp)
Label container with patient's name, date and time collection started, and date and time collection finished.

Transport container:

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

Alternate collection container:

24-hr urine collection container with HCl

Required forms/information:

Total volume

Transport and stability:

Ambient (preferred) - 14 days

Refrigerated - 14 days

Frozen - 14 days

Freeze/thaw cycles - stable x3

Performing lab:

LabCorp Burlington (120253): R-NX

Days set up:

Mo - Fr

TAT:

7 days

Method:

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

Reference ranges:

0.0 - 10.0 mg/24 hours

CPT codes:

83150

LOINC code:

Result 11144-3

Date created:

05/29/2019

Revised date:

04/11/2022

Review date:

03/31/2022