Papillary Carcinoma in Thyroglossal Cyst: an Unusual Case.

Malignancy developing in thyroglossal cysts is very rare. Papillary carcinoma is the most common histopathological type of carcinoma encountered in thyroglossal cysts followed by squamous cell carcinoma. A 50-year-old male presented with a midline neck swelling. After ultrasonography and fine needle aspiration cytology, he underwent Sistrunk operation for removal of the thyroglossal cyst. The histopathology was reported as papillary carcinoma of the thyroid. So, he underwent total thyroidectomy, which showed foci of papillary microcarcinoma. Clinical awareness of this rare condition is essential for proper management. Possibility of malignancy arising in thyroglossal cysts should be considered in elderly patients.