Test Overview
Test Methodology

Liquid Chromatography - Mass Spectrometry (LC-MS)

Test Usage

Confirm diagnosis of neuroblastoma; monitor response to therapy.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Weekly
Analytic Time

8 hours

Soft Order Code
HVA
MiChart Code
Homovanillic Acid, Random Urine
Laboratory
Chemical Pathology
Section
Drug Analysis
Specimen Requirements
Collection Instructions

Collect 24 hour urine specimen. Add 25 mL of 50% glacial acetic acid (15 mL for pediatric patients) to container prior to start of collection. Following collection, mix well, measure 24 hour urine volume, aliquot 10 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form. Specimens with no preservative are also acceptable: add 50% glacial acetic acid to container following collection, mix well and send 10 mL aliquot (preferred); alternatively a non-acidified aliquot will be accepted. Random samples will be accepted on children less than 10 years old, in which case the HVAR test code must be ordered instead of the HVA test code.

Alternate Specimen
May be collected in plain (no preservative) container and acid added at the end of collection. It is preferred to have acid added as soon as possible at the client site, mixed, and an aliquot sent. A non-acidified aliquot may also be sent. [rev 9/08] Random samples will be accepted on children less than 10 years old, in which case the HVAR test code must be ordered instead of the HVA test code.
Red Top Tube
Normal Volume
10 mL aliquot of 24 hour urine collection
Minimum Volume
10 mL aliquot of 24 hour urine collection
Billing
CPT Code
83150
Fee Code
20933
NY State Approved
No
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