Table 2.

False-Positive and False-Negative Assay Results in GI and DM Groups

Patient
Number
GroupIgA AntitTG TitresIgA-EMA
Dilution
Biopsy
1GI220Normal
2GI330Normal
3GI601:10Normal
4*GI2571:20Increased IEL
5GI150CD
6GI7.70CD, IgA-deficient
7DM451:10Normal
8DM571:10Normal
9DM851:20Normal
10DM3041:80Normal
  • IEL indicates intraepithelial lymphocytes.

  • * Later developed biopsy-confirmed CD with a 1:320 EMA titre.