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Lab Test Dictionary

Very Long Chain Fatty Acids (90559)

Methodology

Gass Chromatography/Tandem Mass Spectrometer


Synonyms

Fatty Acid; VLCFA; Peroxisomal Disorders; Phytanic Acid; X-ALD

Specimen Type

Serum

Performing Lab

Quest Diagnostics San Juan Capistrano


Epic ID

LAB01304

Lab Test Days

Monday and Thursday

Standard TAT

4-8 Days


Collection Information

Specimen Required

1-2 mL Blood

Container Type

Red Top (No Additive)

Collection Instructions

Fasting Required (overnight fast). No alcohol consumption for 24 hours prior to draw. For pediatric patients, fasting is not required, but sample collection should occur prior to the next meal or scheduled feeding.


Processing Information - Lab Use Only

Transport Temperature

Refrigerate-OK/Frozen-OK

Specimen Stability

Room Temp: Unacceptable; Refrigerated: 7 Days; Frozen: 30 Days

Rejection Criteria

Hemolysis; Lipemic; Non-fasting samples; Serum separator tube (SST)

Test Volume Required

1 mL Serum

Minimum Test Volume

0.2 mL Serum


Included Tests

Phytanic Acid, Pristanic Acid, Docosanoic C22:0, Tetracosanoic C24:0, Hexacosanoic C26:0; Ratio C24/C22, Ratio C26/C22, Ratio Pristanic/Phytanic and Interpretation.


CPT Codes

82726


Revised

07-17-19

Initials

SL