Lab Test

Very Long Chain Fatty Acids, Peroxisomal

Fatty Acid Profile, Peroxisomal (C22-C26)

Test Codes

Mayo: POX, EPIC: LAB6656, Beaker: XVLCF

Instructions

  • Fast overnight (12-14 hours).
  • Patient must not consume any alcohol for 24 hours before the specimen is drawn.

Specimen Collection Criteria

Collect: One plain Red-top tube
Also acceptable: One Gold-top SST tube

Physician Office/Draw Specimen Preparation

Centrifuge to separate serum from cells within 45 minutes of collection. Transfer serum to a plastic transport tube and freeze (-20°C/-4°F or below).

Preparation for Courier Transport

Transport: 0.5 serum, frozen (-20°C/-4°F or below). (Minimum: 0.2 mL)

Rejection Criteria

Specimens not collected and processed as indicated.

In-Lab Processing

Centrifuge to separate serum from cells within 45 minutes of collection. Transfer serum to a plastic transport tube and freeze (-20°C/-4°F or below).

Transport: 0.5 mL serum, frozen (-20°C/-4°F or below). (Minimum: 0.2 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): unacceptable
Refrigerated (2-8°C or 36-46°F): 15 days
Frozen (-20°C/-4°F or below): 90 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Clinic Laboratories in Rochester, MN.

Performed

Monday – Friday.
Results available within 5-8 days.

Reference Range

By report.

Test Methodology

Gas Chromatography-Mass Spectrometry (GC-MS) Stable Isotope Dilution Analysis.

Interpretation

By report.

Clinical Utility

This assay is useful in evaluating patients with possible peroxisomal disorders, single-enzyme defects of peroxisomal metabolism such as X-linked adrenoleukodystrophy or peroxisomal biogenesis disorders (Zellweger syndrome spectrum).

CPT Codes

82726
LOINC:  C22:0  30194-5, C24:0 / C22:0  30196-0, C24:0  30195-2, C26:0  30197-8, C26:0 / C22:0  3018-6

Contacts

Last Updated

7/20/2021

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