Thyroglossal duct cysts are the most frequently encountered congenital neck masses having a malignancy rate of 1%. The most common malignant form is papillary thyroid carcinoma. Synchronous papillary thyroid carcinoma developing in the thyroglossal duct cyst is rarely seen. Synchronized papillary carcinoma can be described as a multifocal tumor or a metastatic lesion on a thyroglossal duct cyst. In this study, we presented a 29-year-old female patient with a midline neck mass who underwent thyroglossal duck cyst excision and had papillary thyroid carcinoma in the thyroglossal duct cyst. Total thyroidectomy was performed, and histopathological examination showed no malignancy of the thyroid gland.
Keywords: Thyroglossal duct cyst, papillary thyroid cancer, congenital neck masses