A rare case of cholesterol granuloma in the thyroid without an abnormality of lipid metabolism.

This report describes a cholesterol granuloma (CG) of the thyroid. The patient was a 79-year-old male. The mass in the thyroid was observed by chest computed tomography (CT). Initially, he had no clinical symptoms and the mass was not palpable. However, it started and became palpable and painful. He was diagnosed to have subacute thyroiditis. Although he was administered prednisolone (PSL), the mass grew larger and more solid. Then thyroid left lobectomy was performed under general anesthesia. The histological diagnosis was CG of the thyroid. After surgery his clinical course was favorable.