Specimen:

Serum

Collection Medium:

Minimum:

Adult - 5 mL; red top tube
Pediatric - 2 mL; red top tube

Testing Schedule:

Bi-weekly (Mon and Thurs) - Batch analysis performed 
twice weekly on Mondays and Thursdays excluding 
university holidays.

Analytic Time:

1 week

Reference Range:

< 1:5 Titer;  Endomysial IgG antibody is useful in screening for celiac 
disease or dermatitis herpetiformis in patients with selective IgA 
deficiency. Selective IgA deficiency affects 3-5% of celiac and 
dermatitis herpetiformis patients. Endomysial IgG testing is not 100% 
sensitive for detection of such patients and it is recommended that 
anti-tissue transglutaminase EIA also be ordered for best sensitivity.

70-76% of patients with dermatitis herpetiformis and 90+% of patients 
with celiac disease who are on a gluten-containing diet.  Occurence of 
endomysial IgA antibody decreases significantly on gluten-free diets.
Note: Selective IgA deficiencies affects 10-15% of celiac and DH 
patients and this condition will cause a false negative test.  If IgA 
deficiency is known, please note on the requisition and IgG anti-EMA 
test will be done instead of IgA.

Comments:

Include relevant clinical information and consultation request.

Methodology:

Indirect Immunofluorescence

CPT Code:

86255    Endomysial Antibody IgG screen
86255-26 Endomysial Antibody IgG screen interpretation
86256    Endomysial Antibody IgG titer
86256-26 Endomysial Antibody IgG titer interpretation