Abstract
Thyroglossal duct cysts (TGDC) are the most common congenital cervical abnormality, resulting from the remnant epithelial tissue of the thyroglossal duct, occuring in up to 70% of all congenital neck abnormalities. TGDC can be found anywhere in the midline between the foramen cecum and the thyroid gland, but are most frequently found below the level of the hyoid bone (65%), and may occur above the hyoid (20%) or at the level of hyoid (15%). Although they are commonly found near the hyoid bone, they can also be located on the base of the tongue (2%) or lower in the neck (10%). But TGDC found on the posterior surface of the thyroid, the location of parathyroid, is rare. Here, we report a case of a 43-year-old man with TGDC in the posterior of the right thyroid lobe, which was misdiagnosed as a parathyroid adenoma. � Korean J Otorhinolaryngol-Head Neck Surg 2012;55:46-9 Key WordsZZThyroglossal duct cyst ㆍParathyroid adenoma.
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