The mean levels of anti-tTG and anti-DGP antibodies were significantly higher in DH patients compared to healthy controls (36.9 ± 20.3 IU/mL versus 2.1 ± 0.4 IU/mL, p = 0.02, and 40.7 ± 10.2 IU/mL versus 1.87 ± 0.68, p < 0.001, respectively). This evidence concerns the gene TGM2 and dermatitis herpetiformis, familial.