Specimen Requirements


Tissue Transglutaminase (tTG) Antibodies (IgG, IgA)

Specimen Requirement

Collect SST/1.0 mL serum, after 30 minutes of clotting, promptly centrifuge and send.


Immunoassay (IA)


Room temp: 7 days, Refrigerated: 14 days, Frozen: 30 days

Reference Range

Reference ranges are determined by the performing laboratory and will show on the report.


3 days Performed Tuesday-Saturday

Clinical Use

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.

Test Code