Because of the apparent relationship of HMGA2 and PLAG1 in the molecular pathogenesis of salivary gland adenomas and adipose tissue tumors, we also quantified and compared the expression of HMGA2 and PLAG1 mRNA in thyroid adenomas as well as in papillary and follicular thyroid carcinomas. The gene discussed is PLAG1; the disease is tumor of adipose tissue.