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HelpTest Code ARSAW Arylsulfatase A, Leukocytes
Reporting Name
Arylsulfatase A, LeukocytesUseful For
Preferred enzymatic test for detection of arylsulfatase A deficiency
This test is not suitable for carrier detection.
Specimen Type
Whole Blood ACDShipping Instructions
For optimal isolation of leukocytes, it is recommended the specimen arrive refrigerated within 6 days of collection to be stabilized. Collect specimen Monday through Thursday only and not the day before a holiday. Specimen should be collected and packaged as close to shipping time as possible.
Specimen Required
Container/Tube:
Preferred: Yellow top (ACD solution B)
Acceptable: Yellow top (ACD solution A)
Specimen Volume: 6 mL
Collection Instructions: Send specimen in original tube. Do not aliquot.
Specimen Minimum Volume
5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Whole Blood ACD | Refrigerated (preferred) | 6 days | YELLOW TOP/ACD |
| Ambient | 6 days | YELLOW TOP/ACD |
Special Instructions
Reference Values
≥62 nmol/h/mg
Note: Results from this assay may not reflect carrier status because of individual variation of arylsulfatase A enzyme levels. Low normal values may be due to the presence of pseudodeficiency or carrier alleles. Patients with these depressed levels may be phenotypically normal.
Day(s) Performed
Preanalytical processing: Monday through Saturday
Assay performed: Tuesday
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
82657
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| ARSAW | Arylsulfatase A, Leukocytes | 24078-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 8779 | Arylsulfatase A, Leukocytes | 24078-8 |
| 32437 | Interpretation | 59462-2 |
| 32438 | Reason for referral | 42349-1 |
| 32439 | Reviewed by | 18771-6 |
Report Available
2 to 8 daysReject Due To
| Gross hemolysis | Reject |
Method Name
Colorimetric Enzyme Assay
Forms
1. New York Clients-Informed consent is required. Document on the request form or electronic order that a copy is on file. The following documents are available:
-Informed Consent for Genetic Testing (T576)
-Informed Consent for Genetic Testing-Spanish (T826)
2. Biochemical Genetics Patient Information (T602)
3. If not ordering electronically, complete, print, and send a Biochemical Genetics Test Request (T798) with the specimen.
Testing Algorithm
See Lysosomal Storage Disorders Diagnostic Algorithm, Part 2