Thyroglossal duct
746821
163864669
2007-10-11T19:03:34Z
Arcadian
104523
{{Embryology of head and neck}}
{{Infobox Embryology |
Name = {{PAGENAME}} |
Latin = ductus thyroglossalis |
GraySubject = |
GrayPage = |
Image = Illu08 thyroid.jpg |
Caption = Duct not labeled, but arises nearest to region identified as 'pyramidal lobe') |
Image2 = Kiemenbogen.jpg |
Caption2 = Pattern of the branchial arches. I-IV branchial arches, 1-4 [[branchial pouches]] (inside) and/or [[pharyngeal grooves]] (outside)<BR>a [[Tuberculum laterale]]<BR>b [[Tuberculum impar]]<BR>c [[Foramen cecum]]<BR>d [[Thyroglossal duct|Ductus thyreoglossus]]<BR>e [[Sinus cervicalis]] |
System = |
CarnegieStage = 14 |
Precursor =|
GivesRiseTo = |
MeshName = |
MeshNumber = |
DorlandsPre = d_29 |
DorlandsSuf = 12315154 |
}}
The '''thyroglossal duct''' is an [[embryology|embryological]] anatomical structure which forms the connection between the initial area of development of the [[thyroid gland]] and its final position.
The [[thyroid gland]] starts developing in the [[pharynx]] in the [[fetus]] and descends to its final position taking a path through the [[tongue]], [[hyoid bone]] and [[muscles of the neck|neck muscles]]. The connection between its original position and its final position is the thyroglossal duct. This duct normally [[atrophy|atrophies]] and closes off before [[childbirth|birth]] but can remain open in some people.
==Clinical significance==
Failure of the thyroglossal duct to atrophy leads to a [[persistent thyroglossal duct]].
==External links==
* {{eMedicineDictionary|thyroglossal+duct}}
{{developmental-biology-stub}}
{{Embryology of head and neck}}
[[Category:head and neck]]
[[Category:Embryology]]
[[pt:Ducto tireoglosso]]