Sign in →

Test Code POXP Fatty Acid Profile, Peroxisomal (C22-C26), Plasma

Useful For

Evaluating patients with possible peroxisomal disorders, including peroxisomal biogenesis disorders, X-linked adrenoleukodystrophy, and Refsum disease using plasma specimens

 

Aiding in the assessment of peroxisomal function

Reporting Name

Fatty Acid Profile, Peroxisomal,P

Specimen Type

Plasma

Specimen Minimum Volume

0.15 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Frozen (preferred) 92 days
  Refrigerated  15 days

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Reference Values

C22:0

≤96.3 nmol/mL

 

C24:0

≤91.4 nmol/mL

 

C26:0

≤1.30 nmol/mL

 

C24:0/C22:0 RATIO

≤1.39

 

C26:0/C22:0 RATIO

≤0.023

 

PRISTANIC ACID

0-4 months: ≤0.60 nmol/mL

5-8 months: ≤0.84 nmol/mL

9-12 months: ≤0.77 nmol/mL

13-23 months: ≤1.47 nmol/mL

≥24 months: ≤2.98 nmol/mL

 

PHYTANIC ACID

0-4 months: ≤5.28 nmol/mL

5-8 months: ≤5.70 nmol/mL

9-12 months: ≤4.40 nmol/mL

13-23 months: ≤8.62 nmol/mL

≥24 months: ≤9.88 nmol/mL

 

PRISTANIC/PHYTANIC ACID RATIO

0-4 months: ≤0.35

5-8 months: ≤0.28

9-12 months: ≤0.23

13-23 months: ≤0.24

≥24 months: ≤0.39

Day(s) Performed

Monday through Friday

Report Available

3 to 5 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.

CPT Code Information

82726

LOINC Code Information

Test ID Test Order Name Order LOINC Value
POXP Fatty Acid Profile, Peroxisomal,P 43677-4

 

Result ID Test Result Name Result LOINC Value
36641 C22:0 30194-5
36642 C24:0 30195-2
36643 C26:0 30197-8
36644 C24:0/C22:0 30196-0
36645 C26:0/C22:0 30198-6
36646 Pristanic Acid 22761-1
36647 Phytanic Acid 22671-2
36648 Pristanic/Phytanic 30550-8
36649 Interpretation (POXP) 59462-2

Testing Algorithm

For more information see:

-Newborn Screen Follow-up for X-Linked Adrenoleukodystrophy

-Epilepsy: Unexplained Refractory and/or Familial Testing Algorithm

 

If the patient has abnormal newborn screening results for X-linked adrenoleukodystrophy, refer to the appropriate American College of Medical Genetics and Genomics Newborn Screening ACT Sheet.(1)

Forms

1. Biochemical Genetics Patient Information (T602)

2. If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.


Necessary Information


1. Patient's age and sex is required.

2. Biochemical Genetics Patient Information (T602) is recommended, but not required, to be filled out and sent with the specimen to aid in the interpretation of test results.



Specimen Required


Patient Preparation:

1. Fasting-overnight (12-14 hours). If fasting not possible for babies or infants, collect specimen prior to next feeding.

2. Patient must not consume any alcohol for 24 hours before the specimen is collected.

Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Green top (sodium heparin)

Acceptable: Lavender top (EDTA) or green top (lithium heparin)

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot plasma into plastic vial.