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.
< or =0.02 nmol/L
4 - 12 days
- MuSK Ab
- Muscle-specific receptor tyrosine kinase (MuSK) Antibody
Collect specimen in a red top (preferred) or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.
Test sent to Mayo Medical Laboratories.