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MUSK / MUSK-M
MUSCLE SPECIFIC KINASE AUTOANTIBODY SERUM

Test Code MUSK / MUSK-M 
Test MUSCLE SPECIFIC KINASE AUTOANTIBODY SERUM 
Description 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 Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Specimen Volume: 1.5 mL
Minimum Volume: 1.0 mL

Forms: If not ordering electronically, complete, print, and send a Neurology Test Request Form-General (T732) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/neurology-request-form.pdf) 

Reference Values < or =0.02 nmol/L 
Analytic Time 3-10 Days 
Day(s) Test Set Up Tuesday and Thursday; 6:00 a.m. 
CPT Code(s) 83519