Referred Tests
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|---|---|
| Email: | mcl@mayo.edu |
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| Values are valid only on day of printing. | |
Test ID: MGT1
Myasthenia Gravis (MG) Evaluation, Thymoma, Serum
Useful For 
Suggests clinical disorders or settings where the test may be helpful
Investigating patients with suspected or proven thymoma, whether or not symptoms or signs of myasthenia gravis (MG) are present
Serially monitoring patients for recurrence or metastasis after removal of thymoma
Providing a quantitative autoantibody baseline for future comparisons in monitoring a patient's clinical course and the response to thymectomy and immunomodulatory treatment
Assessing the likelihood of occult thymoma in a patient with an acquired disorder of neuromuscular or autonomic transmission
Evaluating bone marrow transplant recipients with suspected graft-versus-host disease, particularly if there is evidence of weakness
Confirming that a recently acquired neurological disorder has an autoimmune basis (eg, MG or dysautonomia)
Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| MGETI | MG Thymoma Interpretation, S | No | Yes |
| ARBI | ACh Receptor (Muscle) Binding Ab | Yes | Yes |
| ARMO | ACh Receptor (Muscle) Modulating Ab | No | Yes |
| STR | Striational (Striated Muscle) Ab, S | Yes | Yes |
| CRMWS | CRMP-5-IgG Western Blot, S | Yes | Yes |
| GANG | AChR Ganglionic Neuronal Ab, S | No | Yes |
| VGKC | Neuronal (V-G) K+ Channel Ab, S | No | Yes |
| GD65S | GAD65 Ab Assay, S | Yes | Yes |
Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.
Recommended for investigation of: 1) a patient with suspected or proven thymoma, whether or not symptoms or signs of myasthenia gravis (MG) are present (also of value for serially monitoring patients after removal of thymoma; a rising autoantibody titer may herald tumor persistence or recurrence), or emergence of an unrelated neoplasm and 2) a bone marrow transplant recipient with suspected graft-versus-host disease, particularly if there is evidence of weakness.
See Myasthenia Gravis: Thymoma Diagnostic Algorithm in Special Instructions.
Special Instructions Library of PDFs including pertinent information and forms related to the test
Method Name A short description of the method used to perform the test
ARBI, ARMO, GANG, GD65S, VGKC: Radioimmunoassay (RIA)
STR: Enzyme Immunoassay (EIA)
CRMWS: Western Blot
NY State Available Indicates the status of NY State approval and if the test is orderable for NY State clients.
Reporting Name Lists a shorter or abbreviated version of the Published Name for a test
Aliases Lists additional common names for a test, as an aid in searching
AChR (Acetylcholine Receptor)
Anti-Skeletal Muscle Antibodies
Muscle End-Plate Antibodies
Myasthenia Gravis Antibodies
Myoid Antibody
Striational (Striated Muscle) Antibodies