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Tissue Transglutaminase (tTG) Antibodies (IgG, IgA)
Test Code11073
Alias/See Also
LAB00324
TTG IGA
TTG IGG
TTG IGA/IGG
TTG IGA
TTG IGG
TTG IGA/IGG
CPT Codes
86364 (x2)
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Container
Transport tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic
Methodology
Immunoassay (IA)
Setup Schedule
Tues-sat
Report Available
2-5 days
Reference Range
Tissue Transglutaminase Antibody, IgG
Tissue Transglutaminase Antibody, IgA
<15.0 U/mL | Antibody not detected |
≥15.0 U/mL | Antibody detected |
Tissue Transglutaminase Antibody, IgA
<15.0 U/mL | Antibody not detected |
≥15.0 U/mL | Antibody detected |
Clinical Significance
Tissue Transglutaminase Antibody, IgA, is useful in diagnosing gluten-sensitive enteropathies, such as Celiac Sprue Disease, and an associated skin condition, dermatitis herpetiformis. The IgG test is useful in patients who are IgA-deficient. The IgG test also provides support for gluten-sensitive enteropathies beyond the IgA test.
Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA |
33608 Ortega Highway |
San Juan Capistrano, CA 92675-2042 |