TGM2 and cranioectodermal dysplasia: Serum TTG in NCGS was negative and significantly lower than that in CeD patients [(2.0, IQR: 0.6–3.5) vs. (46.0, IQR: 24.0–95.0), p < 0.001] but was similar to the normal control group [(2.0, IQR: 0.6–3.5) vs. (1·3, IQR: 0.6–2.4), p= 0.289].