Although MMP20 levels in inflammatory conditions of the thyroid (subacute thyroiditis, Hashimoto thyroiditis, and Graves disease) and benign thyroid neoplasms (fetal adenoma, adenoma, multinodular goiter) were high, notably higher levels of MMP20 are present in papillary carcinoma (Figure 1B). This evidence concerns the gene MMP20 and subacute thyroiditis.