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HelpTest ID BLOD0455 Muscle-Specific Kinase (MuSK) Autoantibody, Serum
Useful For
Diagnosis of autoimmune muscle-specific kinase (MuSK) myasthenia gravis
Second-order test to aid in the diagnosis of autoimmune myasthenia gravis when first-line serologic tests are negative
Establishing a quantitative baseline value for MuSK antibodies that allows comparison with future levels if weakness is worsening
Specimen Type
SerumSpecimen Required
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 1.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
| Gross icterus | Reject |
Specimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 72 hours |
Day(s) Performed
Monday through Friday
Report Available
3 to 10 daysMethod Name
Radioimmunoassay (RIA)
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
86366
Reporting Name
MuSK Autoantibody, SReference Values
≤0.02 nmol/L
Test Classification
This test was developed using an analyte specific reagent. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Neurology Specialty Testing Client Test Request (T732)
-General Request (T239)
Secondary ID
64277SANFORD LABORATORY INTERFACE BUILD INFORMATION
| Result Code | Result Code Description |
|---|---|
| 17710 | Musk Antibody |