Abstract

Thyroglossal duct cyst (TGDC) is the most frequent congenital anomaly of the thyroid gland. The existence of primary malignancy originating from this cyst is uncommon, accounting for less than 1% of all cases. Because of its rarity, there is no universal consensus regarding optimal treatment option. We present a case of a 59-year-old woman with a 25x20 mm mass in the anterior area of the neck that gradually increased in size over six months. A total thyroidectomy and Sistrunk procedure (SP) were performed. Postsurgery histologic evaluation confirmed papillary carcinoma of the TGDC invading adjacent muscle tissue