Infected thyroglossal duct cyst
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CT of the neck with contrast showing an enhancing, well-circumscribed cystic lesion located in the neck at the level of the hyoid bone.
The findings of the CT are compatible with complicated thyroglossal duct cyst.
Thyroglossal duct cysts are the most common cause of midline neck masses and typically located inferior to the hyoid bone (65%) in the region adjacent to the thyrohyoid membrane. Frequently presenting as an asymptomatic neck mass in the pediatric population, the most common presentation in adults is underlying infection of the cyst.