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Test Code LAB1235618 Tissue Transglutaminase IgA

Useful For

Assessment of tissue transglutaminase IgA antibodies for evaluating patients suspected of having celiac disease, including patients with compatible clinical symptoms, patients with atypical symptoms, and individuals at increased risk (family history, previous diagnosis with associated disorder, positivity for HLA DQ2 and/or DQ8)

 

Screening for dermatitis herpetiformis, in conjunction with endomysial antibody test

 

Monitoring response to gluten-free diet in patients with dermatitis herpetiformis and celiac disease.

Performing Laboratory

Asante Rogue Regional Medical Center (ARRMC)

 

Performing Department

Special Chemistry

Specimen Required

Specimen Minimum Volume

0.5 ml

Specimen Stability Information

  • Centrifuge collection tube within two hours of draw.
  • Store samples at room temperature no longer than 8 hours.
  • If assay will not be completed within 8 hours, refrigerate the sample at 2°-8°C.
  • Freeze if testing delayed >2 weeks. 

Reject Due To

  • Hemolysis/Hemolyzed
  • Lipemia
  • Plasma specimens

Day(s) Performed

Tests batched and performed Monday and Thursday,  AM Shift

Method Name

Phadia EliA (Enzyme-linked Fluorescent Immunoassay)

CPT Code Information

86364

Reference Values

  • <4.0 U/mL (negative)
  • 4.0-10.0 U/mL (weak positive)
  • >10.0 U/mL (positive)

Reference values apply to all ages.

 

INTERPRETATION

  • Negative: < 7 U/mL
  • Equivocal: 7-10 U/mL
  • Positive: > 10 U/mL

LOINC Code Information

46128-5

Testing Algorithm

The following algorithms are available: