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Myasthenia Gravis Profile
Test CodeLAB01057
Alias/See Also
LAB01057
LabCorp TC: 165620
LabCorp TC: 165620
CPT Codes
86255, 86041, 86042, 86043
Includes
AChR Binding
AChR Blocking
AChR Modulating
Striational Antibodies
Reflexes to MuSK antibodies if AChR-Binding and blocking are normal.
AChR Blocking
AChR Modulating
Striational Antibodies
Reflexes to MuSK antibodies if AChR-Binding and blocking are normal.
Preferred Specimen
4mL Serum divided into 2 tubes
(Marble/Gold)
(Marble/Gold)
Patient Preparation
No isotopes administered 24 hours prior to venipuncture.
Minimum Volume
2mL Serum
Instructions
Allow a minimum clotting time of 30 to 60 minutes with serum separation within 2 hours of collection. Send serum samples in plastic transport tubes.
Transport Temperature
Refrigerated
Specimen Stability
Refrigerated: 14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Excessive hemolysis, chylous serum, recently administered radioisotopes, plasma
Report Available
6-8 days
Limitations
In rare cases AChR antibodies can be found in patients with other autoimmune disorders or with thymoma without MG.
The causative autoantibody cannot be identified in up to 10 percent of patients with MG.
This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.
The causative autoantibody cannot be identified in up to 10 percent of patients with MG.
This test was developed and its performance characteristics determined by LabCorp. It has not been cleared or approved by the Food and Drug Administration.
Clinical Significance
Tests for the laboratory diagnosis of myasthenia gravis (MG).
Performing Laboratory
LabCorp