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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Tissue Transglutaminase (tTG) Antibodies (IgG, IgA)
Test CodeQTTGS
Quest Code
11073
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
Variable Mon-fri
Report Available
4 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 LLC |
| 200 Forest Street, 3rd Floor, Suite B |
| Marlborough, MA 01752-3023 |
