A 6-year-old boy is brought to the office for evaluation of a neck mass. His mother reports that he first developed that mass 3 days ago, and it has not resolved. Further questioning reveals that he has recently recovered from a viral upper respiratory infection. He is otherwise healthy and is up to date on all recommended vaccinations. Physical examination shows a 2-cm neck mass in the midline immediately above the thyroid cartilage notch. The mas elevates when he sticks his tongue:

A 6-year-old boy is brought to the office for evaluation of a neck mass. His mother reports that he first developed that mass 3 days ago, and it has not resolved. Further questioning reveals that he has recently recovered from a viral upper respiratory infection. He is otherwise healthy and is up to date on all recommended vaccinations. Physical examination shows a 2-cm neck mass in the midline immediately above the thyroid cartilage notch. The mas elevates when he sticks his tongue:

A 6-year-old boy is brought to the office for evaluation of a neck mass. His mother reports that he first developed that mass 3 days ago, and it has not resolved. Further questioning reveals that he has recently recovered from a viral upper respiratory infection. He is otherwise healthy and is up to date on all recommended vaccinations. Physical examination shows a 2-cm neck mass in the midline immediately above the thyroid cartilage notch. The mas elevates when he sticks his tongue:



(A) reactive lymph node
(B) branchial cleft cyst
(C) thyroglossal duct cyst
(D) head and neck neoplasm
(E) thyroid nodule

Answer: (C) thyroglossal duct cyst