Abstract
The report was made on 7 year-old-girl who had congenital thyroglossal fistula. It was classified as incomplete external fistula in which the syrinx existed on the cervical median line at the middle point between the hyoid bone and the jugular fossa, attaching to the under surface of the hyoid bone and ending at the foramen coecum.
The histopathological preparation of the extirpated syrinx showed the excretory duct covered with cylindrical epithelial cells in which the nuclei of various sizes existed in comparatively low positions
