A 4-year-old boy presents to the ENT outpatient department with a fluctuant swelling of the midline of the neck. It is non-tender and mobile, and moves on both swallowing and tongue protrusion. He is otherwise well with no significant past medical history.
What is the most likely diagnosis?
- A) Branchial cyst
- B) Chondroma
- C) Dermoid cyst
- D) Thyroglossal cyst
- E) Thyroglossal duct carcinoma