Ultrasonographic findings of thyroglossal duct papillary carcinoma: A case report.

•Thyroglossal duct cyst carcinoma can be classified as primary, secondary and multicentric.•Preoperative ultrasound with possible fine needle aspiration biopsy are useful for determining the extent of the operation.•The treatment is Sistrunk’s operation with the addition of total thyroidectomy and neck dissection when indicated.