TGM2 and cranioectodermal dysplasia: A recent systematic review including 56 original studies and 12 previous systematic reviews reported strong evidence regarding the high accuracy of IgA anti‐tTG assay for the diagnosis of CeD with pooled sensitivity of 92.8% (95% CI, 90.3–94.8%) and pooled specificity of 97.9% (95% CI, 96.4–98.8%).31