이중 이소성 갑상선 1예

Ectopic thyroid is an uncommon embryological aberration characterized by the presence of thyroid tissue in a site other than its unusual pretracheal region. Usually it occurs along the path of descent of the developing thyroid primodium from the foramen cecum, commonest being lingual followed by sublingual and in the anterior midline of the neck at, or below, the level of the hyoid bone. It is unusual for lingual thyroid to present simultaneously with another ectopic thyroid. We reported patient with dual ectopic thyroid tissue in tongue base and hyoid area. (J Clinical Otolaryngol 2006;17:277-280)