A Case of Lingual Thyroid with Unilateral Thyroid Agenesis and Contralateral Goiter / 대한이비인후과학회지

ABSTRACT

Ectopic thyroid is an uncommon embryological aberration characterized by the presence of thyroid tissue in sites other than in its usual pretracheal region. Lingual thyroid, although it is the most common manifestation of benign ectopic thyroid tissue, is still a rare clinical entity. Thyroid hemiagenesis is also a very rare abnormality, in which one thyroid lobe fails to develop. We report a case of left thyroid hemiagenesis and goiter in the right lobe of a 26-year-old female patient with ectopic lingual thyroid.