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Test Code MUSK Muscle-Specific Kinase (MuSK) Autoantibody, Serum


Specimen 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.


Children's Mercy Hospital Note:

CMH COLLECTION: 3 mL in red gel vacutainer

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

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

Reject Due To

Gross hemolysis Reject
Gross lipemia Reject
Gross icterus Reject

Day(s) Performed

Monday through Friday

Report Available

3 to 10 days

Reporting Name

MuSK Autoantibody, S

Reference Values

≤0.02 nmol/L

Method Name

Radioimmunoassay (RIA)

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information

86366