Genetic testing. 

gluten genes:
HLA-DQB1 Molecular analysis, Allele 1    0202
HLA-DQB1 Molecular analysis, Allele 2    0602
Serologic equivalent: HLA-DQ   2,1  (Subtype 2,6)

Fecal antibody levels were normal.

Blood antibodies were normal.

Duodenal biopsies were normal.

I have a rash on my hips that I think may be Dermatitis Herpeformis, but it's not textbook.  It's bilateral, and extremely itchy, and will itch a couple of days before the lesion shows up (if it ever does), and when it does show up, it looks like a flake of dry skin there (if I haven't scratched it off first).  Most of the time it just likes a purple spot of excema.  When it first started happening a couple of years ago, I thought I was getting shingles.

I've never been tested, but I think I may be IgA deficient.  I don't know what makes me think that though, other than I have no explanation for why all my antibody tests come back normal.  I don't get sick easily — as a matter of fact, if a tummy bug is going around, it won't hit me as hard as it hits the rest of the family.  An IgG test for wheat came back really high about a year ago, but it wasn't gluten specific.  I am also IgE allergic to wheat — class 2.

Here's the rest of my Enterolab results:

Fecal Antigliadin IgA    6   (Normal Range <10 Units)

Fecal Antitissue Transglutaminase IgA    6 Units   (Normal Range <10 Units)

Quantitative Microscopic Fecal Fat Score    287 Units   (Normal Range <300 Units)

Fecal anti-casein (cow’s milk) IgA antibody    6 Units   (Normal Range <10 Units)