CASE 167

History: An infant presents with a palpable lump under her chin.

1. What should be included in the differential diagnosis of the imaging finding shown in Figure A? (Choose all that apply.)

A. Thyroglossal duct cyst

B. Branchial cleft cyst

C. Sebaceous cyst

D. Dermoid cyst

E. Laryngocele

2. What is the most common presentation of a thyroglossal duct cyst?

A. Dysphagia

B. Asymptomatic

C. Palpable mass

D. Hypothyroidism

3. What is the most common complication of a thyroglossal duct cyst?

A. Carcinoma

B. Infection

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