Among the 18 studies on adults, only 5 found Fusobacteria, 1 indicating lower abundance in CeD patients (40), another showing that TCeD with positive anti-TG2 IgA serology, which was a symptomatic group without a strict GFD or a short-time of GFD adherence, had a specific reduction of Fusobacteria abundance compared to controls, but between the TCeD groups, no relevant difference was observed (50). Here, TGM2 is linked to cranioectodermal dysplasia.