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The midline cutaneous opening in the infrahyoid neck was cannulated and 1 cc of water-soluble contrast was injected. 

The fistulous tract extended superiorly from midline infrahyoid region, coursing along the anterior surface of hyoid bone and is seen extending up to the foramen caecum of the tongue. The tract measures 4.0 cm in length and 1.9 mm in diameter. There is mild dilatation of the tract at the level of cutaneous opening measuring 5.0 x 2.8 mm. These features are consistent with thyroglossal duct fistula.

There is a blind-ending secondary oblique ramification of the tract in the tongue towards the left side.  The secondary tract measures 1.3 cm in length and 2.0 mm in diameter.

No midline cystic lesion is seen in the neck.  No significant lymphadenopathy.