“…2,24 Unlike normal thyroid tissue, which reveals homogeneous high echogenicity on US images, lymphocytic thyroiditis shows destruction of follicular architecture and lymphocytic infiltrations, which result in heterogeneous decreased echogenicity. 8,18,29,30 In our study, even when experienced radiologists assessed the presence of lymphocytic thyroiditis on the basis of known US features of lymphocytic thyroiditis, their assessments were not consistent (generalized κ = -0.002-0.781). This finding indicated that visual inspection of grayscale US images had poor reproducibility, and diagnostic performances were variable among the 3 reviewers.…”