[Thyroglossal duct papillary carcinoma in 1 case and the literature review].

Thyroglossal duct cyst and fistula is one of the most common birth defects. Thyroglossal duct carcinoma occurred in residual thyroglossal tube or thyroglossal duct cyst is a rare disease which is often difficult to diagnosis by clinical examination, and the prognosis by surgical removal is good. We present a 29-year-old female with thyroglossal duct cyst.