Jiménez Oliver V, Ruiz Rico R, Dávila Morillo A, Fernández Ruiz E, Ruiz del Portal J M, Pérez Arcos J A, Rodríguez Baró G
Servicio de ORL, Hospital Clínico Universitario Virgen de la Victoria, Málaga.
Acta Otorrinolaringol Esp. 2002 Jan;53(1):54-9. doi: 10.1016/s0001-6519(02)78282-4.
A Ectopic thyroid is any thyroid tissue not located in his normal anatomic situation. There have been described four general groups within the upper aerodigestive tract: lingual, sublingual, thyroglossal and intralaryngotracheal. Intralaryngotracheal thyroid tissue is rare and constitute 7 per cent of all intratracheal tumours, and it represents a problem of diagnosis and management. The controversy about the genesis of this tumours remains. There are two established theories: "the malformation theory" and "the ingrowth theory". These tumours affect more frequently adult female. Intralaryngotracheal thyroid have been mainly reported on the posterior-left wall of the trachea. The most common clinical feature is stridor due to progressive upper airway obstruction. Up to 75% of the intralaryngotracheal goiters are associated with and external goiter. This paper reports a case of ectopic subglotic thyroid in a 42 year-old-female. The embryology, diagnosis and management of this tumours are discussed.
