The controls used in the study by Krysiak [15] were woman aged between 20 and 45 years old with recently diagnosed and previously untreated autoimmune thyroiditis (i.e., with positive TPO-Ab, reduced echogenicity of the thyroid parenchyma on thyroid ultrasonography, and normal thyroid function), who were incidentally found to be positive for anti-tissue transglutaminase antibodies without clinical symptoms of CD. This evidence concerns the gene TGM2 and autoimmune thyroid disease.