Red top (preferred) or SST tube
1.5 mL serum
1 mL serum
Collect specimen in a red top (preferred) or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate.
Collect specimen in a red top (preferred) or SST tube.
Monday - Friday
4 - 12 days
RIA
< or =0.02 nmol/L
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.
Test sent to Mayo Medical Laboratories.
83519
21611
Room temperature: 72 hours; Refrigerated: 28 days; Frozen: 28 days.