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Arylsulfatase A, Leukocytes
Test Code0743
Quest Code
5216
Alias/See Also
Quest 5216; Sunquest: ARSW
CPT Codes
82657
Preferred Specimen
6 mL whole blood collected in an ACD (yellow-top) tube
Minimum Volume
5 mL
Instructions
Specimen must arrive within 96 hours of draw to be stabilized. Draw specimen Monday-Thursday only and not the day before a holiday. Specimen should be drawn and packaged as close to shipping time as possible. Do not transfer blood to other containers.
NOTE: New York clients: An informed consent is required. Please document on the test requisition or electronic order that a copy is on file.
NOTE: New York clients: An informed consent is required. Please document on the test requisition or electronic order that a copy is on file.
Transport Container
ACD (yellow-top) tube
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: 4 days
Refrigerated: 4 days
Frozen: Unacceptable
Refrigerated: 4 days
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis
Methodology
Colorimetric Enzyme Assay
Setup Schedule
Fri
Report Available
8-15 days
Reference Range
≥62 nmol/h/mg
Clinical Significance
Preferred test for detection of metachromatic leukodystrophy.
Performing Laboratory
| Mayo Clinical Laboratories |
| 200 1st Street SW |
| Rochester, MN 55905-0001 |
