Striated Muscle Antibodies, IgG with Reflex to Titer
Recommended for differential evaluation of neuromuscular junction diseases including myasthenia gravis (MG).
Semi-Quantitative Indirect Fluorescent Antibody
New York DOH Approval Status
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL)
Plasma. Contaminated, hemolyzed, or severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Less than 1:40
When detected in the presence of acetylcholine receptor (AChR) antibody, striated muscle antibodies, which bind in a cross-striational pattern to skeletal and heart muscle tissue sections, are associated with late-onset myasthenia gravis (MG). Striated muscle antibodies recognize epitopes on three major muscle proteins, including: titin, ryanodine receptor (RyR) and Kv1.4 (an alpha subunit of voltage-gated potassium channel [VGKC]). Isolated cases of striated muscle antibodies may be seen in patients with certain autoimmune diseases, rheumatic fever, myocardial infarction, and following some cardiotomy procedures.
This test was developed and its performance characteristics determined by ARUP Laboratories. It has not been cleared or approved by the US Food and Drug Administration. This test was performed in a CLIA certified laboratory and is intended for clinical purposes.
Analyte Specific Reagent (ASR)
If Striated Muscle Abs detected, a titer will be added. Additional charges apply.
86255; if reflexed, add 86256
|Component Test Code*||Component Chart Name||LOINC|
|0050747||Striated Muscle Antibodies, IgG Screen||49692-7|
- Anti-Skeletal Muscle IgG Antibodies
- Anti-Striated Antibody
- Anti-Striated Muscle Antibody
- Muscle (Skeletal) Antibodies
- Myoid Antibody
- Skeletal Muscle Antibodies
- Striational Antibodies