ARYLSULFATASE A

Test Documentation
Specimen Required
Collect 24 hour urine, refrigerate during collection. Send 10.0 mL urine (5.0 mL minimum) refrigerated in a screw-capped plastic vial. Record total volume on test requisition and specimen label.

Rejection Criteria
Preserved urines

Methodology
Colorimetry, kinetic

Stability
Room Temperature: Unacceptable; Refrigerated: 14 days; Frozen: Unacceptable

Reference Range
>=19 nmol/h/mL
Interpretation: Greatly reduced levels of arylsulfatase A in urine (< or = 15 nmol/h/mL), as well as in serum and various tissues, is seen in patients with metachromatic leukodystrophy.

Performed
Specimens are processed on Wednesday. Assay is performed on Thursday.

Turnaround Time10-18 days
Test CodeZUARY
CPT-4 Code (s)
84311
LOINC Codes
42726-0

Warde
Medical
Laboratory