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| 90135:ARYLSULFATASE A, 24-HOUR URINE | |||||||||
| Alias Names: | ARSA Deficiency / Metachromatic Leukodystrophy / MLD | ||||||||
| Methodology: | Colorimetric / Kinetic | ||||||||
| Edit Date: | 8/31/2010 | ||||||||
| Performed: | Monday, Thursday | ||||||||
| Released: | 4-6 days after setup at PeaceHealth Laboratories’ reference lab | ||||||||
| CPT Code: | 84311-90 | ||||||||
| 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 | ||||||||
| Transport: | Refrigerated. | ||||||||
| 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). |
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| Reference Range: | |||||||||||||||||||
| >1 U/L
Note: Results from this assay may not reflect carrier status because of individual variation of arylsulfatase A enzyme levels. |
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