SECTION EDITOR: C. DOUGLAS PHILLIPS, MD
Diagnosis: Pediatric base of tongue thyroglossal duct cyst (TGDC)
Thyroglossal duct cysts are the most common congenital cervical anomaly.1,2 They arise from the embryological remnants of an epithelial-lined tract that represents the path of descent of the thyroid anlage from the base of the tongue during fetal development. They may be located anywhere along this embryological pathway, from the base of the tongue at the level of the foramen cecum to the anterior aspect of the neck and as far caudally as the superior mediastinum. It is not uncommon for TGDCs to contain ectopic thyroid tissue.
Radiology Quiz Case 2: Diagnosis. Arch Otolaryngol Head Neck Surg. 2011;137(9):956-957. doi:10.1001/archoto.2011.149-b