|Test Code||STMAB / STR-M|
|Test||STRIATIONAL (STRIATED MUSCLE) ANTIBODIES, SERUM|
|Methodology||Enzyme Immunoassay (EIA)|
|Description||This test is a useful serological aid in the diagnosis of thymoma, especially in patients with onset of myasthenia gravis at <= 45 years of age. It is most predictive of thymoma at any age when accompanied by a muscle acetycholine receptor (AChR) modulating antibody value of 90% AChR loss or greater. It is useful as a screening test for MG in older patients, especially when tests for muscle AChR antibodies are negative. Serial measurements are useful in monitoring the efficacy of immunosuppressant treatment in patients with MG, and in monitoring autoimmune complications and graft-vs.-host disease in recipients of D-penicillamine or bone marrow allografts.
See "Myasthenia Gravis (MG) Tests" for further information.
|Specimen||Draw blood in either a plain, red-top tube or serum gel tube. Spin down and send 1.5 mL (minimum: 1.0 mL) of serum refrigerated in a screw-capped, plastic vial.|
|Reference Values||< 1:60|
|Analytic Time||3 Days|
|Day(s) Test Set Up||Monday, Wednesday, Thursday|