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Thyroglossal duct

FieldValue
NameThyroglossal duct
Latinductus thyreoglossus
ImageIllu08 thyroid.jpg
CaptionDuct not labeled, but arises nearest to region identified as 'pyramidal lobe')
Image2Kiemenbogen.jpg
Caption2Pattern of the branchial arches. I-IV branchial arches, 1-4 branchial pouches (inside) and/or pharyngeal grooves (outside)
a Tuberculum laterale
b Tuberculum impar
c Foramen cecum
d Ductus thyreoglossus
e Sinus cervicalis
CarnegieStage14

a Tuberculum laterale b Tuberculum impar c Foramen cecum d Ductus thyreoglossus e Sinus cervicalis The thyroglossal duct is an embryological anatomical structure forming an open connection between the initial area of development of the thyroid gland and its final position. It is located exactly mid-line, between the anterior 2/3 and posterior 1/3 of the tongue.

The thyroid gland starts developing in the oropharynx in the fetus and descends to its final position taking a path through the tongue, hyoid bone and neck muscles. The connection between its original position and its final position is the thyroglossal duct. This duct normally atrophies and closes off as the foramen cecum before birth but can remain open in some people.

Clinical significance

A thyroglossal duct that fails to atrophy is called a persistent thyroglossal duct, a condition that may lead to the formation of a thyroglossal duct cyst.

References

References

  1. (February 23, 2019). "Thyroglossal Duct Cyst".
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human-head-and-neck human-embryology
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