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90559: Very Long Chain Fatty Acids Print View
Interpretation      
Age      
Gender      
Phytanic Acid   < 5 years: Call Client Services
< 18 years: 0.37 - 3.46
>= 18 years: 0.48 - 3.13 
umol/L 
Pristanic Acid   < 5 years: Call Client Services
< 18 years: < .29
>= 18 years: < .36 
umol/L 
Docosanoic Acid, C22   < 5 years: Call Client Services
< 18 years: 32.04 - 84.33
>= 18 years: 39.18 - 99.2 
umol/L 
Tetracosanoic Acid, C24   < 5 years: Call Client Services
< 18 years: 25.27 - 64.05
>= 18 years: 31.26 - 84.11 
umol/L 
Hexacosanoic Acid, C26   < 5 years: Call Client Services
< 18 years: < .69
>= 18 years: < .95 
umol/L 
Ratio C24/C22   < 5 years: Call Client Services
< 18 years: 0.67 - 0.87
>= 18 years: 0.64 - 0.99 
 
Ratio C26/C22   < 5 years: Call Client Services
< 18 years: 0.002 - 0.01
>= 18 years: 0.002 - 0.01 
 
Ratio Pristanic/Phytanic   < 5 years: Call Client Services
< 18 years: 0.02 - 0.15
>= 18 years: 0.01 - 0.16 
 
Discriminant Function   Male: < 7.6
Female: < 5.1 
 

PRIMARY
1 Serum 0.5 (0.3) mL   Frozen - 30 Day(s)/Refrigerated - 7 Day(s)  
ALTERNATE

Peroxisomes play a vital role in several metabolic pathways, including the synthesis of plasmalogens and bile acids. They are also involved in the catabolism of very long chain fatty acids (VLCFAs), phytanic acid, and pristanic acid. Defects in these pathways usually result in the accumulation in tissues and body fluids of one or more metabolites derived from the blocked metabolic steps. Specific accumulations are used for the differential biochemical diagnosis of numerous peroxisomal disorders. These disorders include (a) Zellweger spectrum disorders of peroxisomal biogenesis, (b) X-linked adrenoleukodystrophy (X-ALD) and its adult form X-linked adrenomyeloneuropathy (X-AMN), (c) Refsum disease (Phytanoyl-CoA hydroxylase Deficiency), and (d) 2-methylacyl-CoA racemase deficiency.

0.5mL red-top (no gel) serum

Draw sample in the morning following an overnight fast (12-14 hours).

Avoid Alcohol for 24 hours prior to collection. Plasma is
unacceptable.


Reject Criteria: Samples collected in serum separator tubes;
lipemic, icteric, and grossly hemolyzed samples.


Transport Temperature: Ship refrigerated
Setup Schedule
Tuesday, Thursday

Reported (Analytical Time)
3 days

CPT Code
82726

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

Notes
METHODOLOGY: Liquid Chromatography, Mass Spectrometry (LC/MS) Effective January 9, 2012, this test previously performed at Mayo Medical Laboratories will now be performed at Quest Diagnostics Nichols Institute, San Juan Capistrano. Please provide age and gender.






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For test information, please call Client Services at 800-421-4449.

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