Abstract
The thyroid gland descends in its embryologic development from the foramen cecum at the base of the tongue to the front of the pharyngeal gut where it reaches its final position in the seventh week. The trajectory of the migration forms the thyroglossal duct, which obliterates normally and finally disappears. When the process of migration is disturbed, aberrant thyroid tissue may appear in later life along the tract of migration. Thyroid tissue, however, has also been found at sites besides the embryologic tract of migration as in the submandibular region, in the carotid sheath, retropharyngeal, and intracardial. We present a patient in which the clinical presentation, imaging techniques, cytologic and histologic findings made the diagnosis of ectopic thyroid tissue difficult.
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