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HelpTest Code AGAS Alpha-Galactosidase, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumOrdering Guidance
If testing is needed for assessment of meat or meat-derived product allergy, order either ALGAL / Galactose-Alpha-1,3-Galactose (Alpha-Gal), IgE, Serum or APGAL / Galactose-Alpha-1,3-Galactose (Alpha-Gal) Mammalian Meat Allergy Profile, Serum.
Enzyme testing is unreliable for female patients as results may be within the normal values even in affected female patients; order GLA / Fabry Disease, GLA Gene Sequencing with Deletion/Duplication, Varies.
Additional Testing Requirements
Urine sediment analysis for the accumulating trihexoside substrate and measurement of globotriaosylsphingosine are recommended. Order both CTSU / Ceramide Trihexosides and Sulfatides, Random, Urine and LGB3S / Globotriaosylsphingosine, Serum in conjunction with this test.
Necessary Information
Sex of patient is required for interpretation of results.
Specimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 2 mL serum
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
Serum: 0.3 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Frozen (preferred) | 14 days |
| Refrigerated | 24 hours |
Reference Values
0.074-0.457 U/L
Note: Results from this assay are not useful for female carrier determination. Carriers usually have levels in the normal range.
Day(s) Performed
Tuesday, Friday
CPT Code Information
82657
Genetics Test Information
Serum is the preferred screening specimen for Fabry disease.
Enzyme testing is useful in identifying affected male patients.