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T-TRANSGLUTAMINASE (TTG) IGG
Test Code164988
CPT Codes
83516
Preferred Specimen
serum
Minimum Volume
0.5
Instructions
"Specimen should be free of bacterial contamination, hemolysis, and lipemia. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
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Transport Container
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Red-top tube or gel-barrier tube
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Red-top tube or gel-barrier tube
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Transport Temperature
"Refrigerate
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Specimen Stability
14 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
"Hemolysis; lipemia; gross bacterial contamination
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Methodology
"Enzyme immunoassay (EIA) "
Limitations
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A negative result does not rule out celiac disease. The inclusion of the tTG IgG autoantibodies is important because it is not uncommon for celiac patients to be IgA deficient. Results of this assay should be used in conjunction with clinical findings and other serological tests.
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A negative result does not rule out celiac disease. The inclusion of the tTG IgG autoantibodies is important because it is not uncommon for celiac patients to be IgA deficient. Results of this assay should be used in conjunction with clinical findings and other serological tests.
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Reference Range
"• Negative: <6 units/mL
• Weak positive: 6-9 units/mL
• Positive: >9 units/mL
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• Weak positive: 6-9 units/mL
• Positive: >9 units/mL
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