By the way, the tissue trasnglutaminase-3 is the antibody involved with DH. (celiac in the skin)
(and the ttg-6 is for antibodies in the CNS)
Those cross react sometimes a bit with the ordinary celiac test Ttg-2, sometimes not.
By they way, do you have DH?
The diagnosis is via skin biopsy of healthy skin while you still eat gluten