Functional lingual thyroid as unusual cause of progressive Dysphagia.

Lingual thyroid is an uncommon developmental anomaly and is the result of failure of the thyroid to descend from the foramen caecum to its prelaryngeal site. The lingual thyroid with a functioning thyroid gland in the neck is even more rare. In this report, we describe a 40-year-old female patient with a foreign body sensation and progressive dysphagia caused by ectopic lingual thyroid that is 5 x 4 x 3 cm in size. Here we present a patient with functional lingual thyroid gland who had had thyroidectomy 20 years ago. Lingual thyroid, which is like a malignant mass, was excised by external approach without complications.