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|90135:ARYLSULFATASE A, 24-HOUR URINE|
|Alias Names:||ARSA Deficiency / Metachromatic Leukodystrophy / MLD|
|Methodology:||Colorimetric / Kinetic|
|Released:||4-6 days after setup at PeaceHealth Laboratories’ reference lab|
|Specimen Collection Details|
|Collection:||10 mL from a well mixed 24-hour urine collection. Refrigerate during collection, storage, and transport. No preservatives are necessary.|
|Handling:||Note total volume. Keep refrigerated.|
|Stability:||Refrigerated. Unstable ambient or frozen.|
|Standard Volume:||10 mL aliquot urine|
|Minimum Volume:||4 mL aliquot urine|
|Comments:||Random urine is acceptable, but there are no normal ranges.
Useful for detection of metachromatic leukodystrophy (MLD) as a secondary specimen to confirm results from leukocytes (preferred initial specimen).
Note: Results from this assay may not reflect carrier status because of individual variation of arylsulfatase A enzyme levels.