Biomarkers · Chemical
We have not added a physiological summary for this biomarker yet. Compare the commercial laboratory assays and population reference ranges below.
Check orderable catalog codes, specimen types, fasting requirements, and demographic reference ranges across laboratories.
Laboratory assay overview
Test for the laboratory diagnosis of myasthenia gravis (MG)
Labcorp test directory, test code 086020
Laboratory assay overview
This is used to test for the laboratory diagnosis of myasthenia gravis (MG).
Labcorp test directory, test code 165605
Laboratory assay overview
Test for the laboratory diagnosis of myasthenia gravis (MG)
Labcorp test directory, test code 165592
Laboratory assay overview
Test for the laboratory diagnosis of myasthenia gravis (MG)
• Negative: 0.00−0.24 nmol/L • Borderline: 0.25−0.40 nmol/L • Positive: >0.40 nmol/L
Labcorp test directory, test code 085902
Laboratory assay overview
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.
Negative ≤0.30 nmol/L Equivocal 0.31-0.49 nmol/L Positive ≥0.50 nmol/L
Quest Diagnostics test directory, test code 206
Laboratory assay overview
Lambert-Eaton myasthenic syndrome is a paraneoplastic phenomena associated with small cell lung cancer. There is a decrease of voltage-gated calcium channels on presynaptic nerve terminals due to an auto-antibody reactive with the channels. There is an associated proximal muscle weakness and often coexisting thyroid autoimmune disease and vitiligo.
Quest Diagnostics test directory, test code 11306
Laboratory assay overview
Myasthenia Gravis is a neurological disorder characterized by a decrease in acetylcholine receptors. Patients exhibit skeletal muscle weakness and fatigability. Approximately 80% of patients with Myasthenia Gravis, excluding ocular involvement only, have detectable acetylcholine receptor antibody.
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Quest Diagnostics test directory, test code 10104
Laboratory assay overview
Myasthenia gravis (MG) is an autoimmune disorder affecting the neuromuscular junction. 80% of patients with generalized MG have serum antibodies to AChR - Blocking, Binding, or Modulating. Antibodies to MuSK make up a variable proportion of the remaining 20%.
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Quest Diagnostics test directory, test code 93859
Laboratory assay overview
Myasthenia Gravis is a neurological disorder characterized by a decrease in acetylcholine receptors. Patients exhibit skeletal muscle weakness and fatigability. Approximately 80% of patients with Myasthenia Gravis, excluding ocular involvement only, have detectable acetylcholine receptor antibody. There is a strong correlation between the presence of striated muscle antibody and the presence of thymoma.
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Quest Diagnostics test directory, test code 10211
Laboratory assay overview
Tests for the laboratory diagnosis of myasthenia gravis (MG)
Labcorp test directory, test code 165620
Laboratory assay overview
Detection of antineuronal autoantibodies aids the diagnosis of paraneoplastic syndromes and autoimmune encephalopathies and related conditions. Identification of specific antineuronal autoantibodies may direct evaluation for underlying often occult malignancy. Characterization of autoantibody specificity may allow syndromic classification and assist in diagnosis and management. Antineuronal antibodies are detected and characterized based on indirect immunofluorescence staining pattern on multiple neuronal, non-neuronal tissues, and transformed substrate cells, and radioimmunoassays, and western blot analysis.
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Quest Diagnostics test directory, test code 93876
We compile every detail above directly from named laboratory directories and published clinical studies. Laboratories calculate standard reference intervals from the statistical distribution of tested populations for a specific assay method and demographic group, rather than setting universal optimal targets.
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