Acetylcholine Receptor Binding Antibody

Acetylcholine Receptor Binding Antibody

Test Code

206
86041
206
86041
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.

Clinical Significance

Acetylcholine Receptor Binding Antibody - Myasthenia Gravis (MG) is an autoimmune neuromuscular disorder characterized by muscle weakness, most commonly due to autoantibody-mediated loss of functional acetylcholine receptors (AChR) in the neuromuscular junction. AChR binding autoantibodies are diagnostic of MG, and are found in 85-90% of MG patients. This assay aids in the differential diagnosis of conditions with MG-like muscle weakness and in monitoring therapeutic response. If binding antibodies are negative, assays for modulating and blocking antibodies should be considered.

Test Details

Methodology

Radioimmunoassay (RIA)

Reference Range(s)

Negative ≤0.30 nmol/L
Equivocal 0.31-0.49 nmol/L
Positive ≥0.50 nmol/L

LOINC® Codes, Performing Laboratory

Methodology

Radioimmunoassay (RIA)

Reference Range(s)

Negative ≤0.30 nmol/L
Equivocal 0.31-0.49 nmol/L
Positive ≥0.50 nmol/L

Preferred Specimen(s)

1 mL serum

Minimum Volume

0.5 mL

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

  • Room temperature: 14 days
  • Refrigerated: 14 days
  • Frozen: 30 days

Reject Criteria

Gross hemolysis • Grossly lipemic • Microbially contaminated

Setup Schedule

1 mL serum
0.5 mL
Transport tube
Room temperature
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 30 days
Gross hemolysis • Grossly lipemic • Microbially contaminated
Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide SERVICE AREA INFORMATION to find available tests you can order.
In-home collection may be available in your area for purchase through Quest Mobile.
Test Details

Clinical Significance

Test Resources

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.

The tests listed by specialty and category are a select group of tests offered. For a complete list of Quest Diagnostics tests, please adjust the filter options chosen, or refer to our Directory of Services.