Inflammatory myofibroblastic tumor of the thyroid gland: a brief case report.

Inflammatory myofibroblastic tumor (IMT), also known as inflammatory pseudotumor (IPT) or plasma cell granuloma (PCG), is a histologically distinctive lesion that occurs primarily in the viscera and soft tissue, but has been reported in nearly every site in the body.1 Until now, only 19 cases of IMT that have involved the thyroid have been reported in the English literature.2 Moreover, most cases in the thyroid have been described as cases of PCG,2 and the myofibroblastic component in the thyroid cases is usually not prominent. Only one case has reported IMT of the thyroid gland.3 This study reports and discusses the differential diagnosis of an IMT of the thyroid gland that occurred in a 50-year-old Korean woman and which showed a predominantly myofibroblastic proliferation.