Discussion and conclusion
Thyroglossal duct cyst is the most common congenital midline neck swelling. It results from failure of obliteration of thyroglossal duct which form a bridge between base of tongue and thyroid gland. Thyroglossal Duct Cyst usually present as painless cystic mobile fluctuant swelling in close proximity to hyoid bone [1, 2, 3] which moves with deglutition and protrusion of tongue. In adults one fourth of patients presented with draining sinus that result from spontaneous drainage or surgical drainage of abscess [4].
Thyroglossal Duct Cyst results from failure of involution of thyroglossal duct and present as midline cyst as fistula or sinus in neck which should be properly investigated and diagnosed and should be excised preferably by sistrunk procedure. Our study is small to reach any conclusion but whenever you come across a midline neck swelling,thyroglossal duct cyst should be ruled out. Clinical and radiological findings were altered and limited due to history of neck trauma.This case illustrates the need to consider thyroglossal duct cyst in the differential diagnosis when working up a post-traumatic neck swelling with discharge. A secondary educational objective in this case is to be diligent to consider and rule out laryngeal fracture in the case of a neck mass presenting after trauma as they can easily be missed and present with many overlapping symptoms.