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Foregut cysts represent abnormal budding of the tracheobronchial anlage during embryogenesis. They occur most commonly in the mediastinum and pulmonary parenchyma and very seldom in the neck. A 42-year-old woman developed neck swelling and discomfort. An ultrasound scan showed a cystic nodule with a thick wall extending from the left lower pole of the thyroid gland. The material obtained from fine needle aspiration of the cyst demonstrated numerous detached ciliated tufts (DCTs) in a background of amorphous debris and degenerated cells. A diagnosis of ciliated cell remnants or DCTs consistent with a foregut cyst was made. Although this entity is rare, awareness of its occurrence in the thyroid gland may prevent unnecessary surgery.


Daniel C Dim, Marcella Riveros-Angel, Jade Wong-You-Cheong, Chen-Chih Sun. Ultrasound-guided fine needle aspiration cytology diagnosis of a foregut cyst in the thyroid: a case report. Acta cytologica. 2009 Sep-Oct;53(5):584-6

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PMID: 19798889

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