Thyroglossal duct: Difference between revisions
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==Pathophysiology== | ==Pathophysiology== | ||
Failure of the thyroglossal duct to atrophy leads to a [[persistent thyroglossal duct]]. 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 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. | Failure of the thyroglossal duct to atrophy leads to a [[persistent thyroglossal duct]]. 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 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. | ||
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[[Image:Kiemenbogen.jpg|thumb|center|300px|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]] ]] | [[Image:Kiemenbogen.jpg|thumb|center|300px|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]] ]] | ||
Revision as of 18:57, 21 February 2013
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
The thyroglossal duct is an embryological anatomical structure which forms the connection between the initial area of development of the thyroid gland and its final position.
Pathophysiology
Failure of the thyroglossal duct to atrophy leads to a persistent thyroglossal duct. 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 neck muscles. The connection between its original position and its final position is the thyroglossal duct. This duct normally atrophies and closes off before birth but can remain open in some people.
a Tuberculum laterale
b Tuberculum impar
c Foramen cecum
d Ductus thyreoglossus
e Sinus cervicalis