Common hepatic duct: Difference between revisions

The common hepatic duct is the first part of the biliary tract.<ref>{{Citation|lastlast1=Manohar|firstfirst1=Rohan|title=Chapter 45 - Liver Stem Cells|date=2014-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780123983589000458|work=Principles of Tissue Engineering (Fourth Edition)|pages=935–950|editor-last=Lanza|editor-first=Robert|place=Boston|publisher=Academic Press|language=en|doi=10.1016/b978-0-12-398358-9.00045-8|isbn=978-0-12-398358-9|access-date=2021-01-26|last2=Lagasse|first2=Eric|editor2-last=Langer|editor2-first=Robert|editor3-last=Vacanti|editor3-first=Joseph}}</ref> It is formed by the union of the right hepatic duct (which drains bile from the right functional lobe of the liver) and the left hepatic duct (which drains bile from the left functional lobe of the liver).<ref name=":1">{{Citation|lastlast1=Bergman|firstfirst1=Simon|title=CHAPTER 14 - Alimentary Tract (Esophagus, Stomach, Small Intestine, Colon, Rectum, Anus, Biliary Tract)|date=2008-01-01|url=http://www.sciencedirect.com/science/article/pii/B9781416042082100144|work=Comprehensive Cytopathology (Third Edition)|pages=373–408|editor-last=Bibbo|editor-first=Marluce|place=Edinburgh|publisher=W.B. Saunders|language=en|isbn=978-1-4160-4208-2|access-date=2021-01-26|last2=Geisinger|first2=Kim R.|editor2-last=Wilbur|editor2-first=David}}</ref> It ends by uniting with the cystic duct (coming from the gallbladder) to form the [[bile duct]].'''<ref name=":022">{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |vauthors= |publisher= |year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=265}}</ref>'''

The duct is about 3 &nbsp;cm long.'''<ref name=":0222">{{Cite book |last=Sinnatamby |first=Chummy S. |title=Last's Anatomy |vauthors= |publisher= |year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=265}}</ref>''' The common hepatic duct is about 6 &nbsp;mm in diameter in adults, with some variation.<ref name="gray">Gray's Anatomy, 39th ed, p. 1228</ref>

The common hepatic duct typically unites with the cystic duct some 1-2cm1–2&nbsp;cm superior to the duodenum and anterior to the right hepatic artery, with the cystic duct approaching the common hepatic duct from the right.'''<ref name=":0220222" />'''

Around 1.7%<ref name=":0" /> of people have additional accessory hepatic ducts that opens into the common hepatic duct.<ref name=":0">{{Citation|lastlast1=Portmann|firstfirst1=Bernard C.|title=3 - Developmental abnormalities and liver disease in childhood|date=2012-01-01|url=http://www.sciencedirect.com/science/article/pii/B9780702033988000039|work=MacSween's Pathology of the Liver (Sixth Edition)|pages=101–156|editor-last=Burt|editor-first=Alastair D.|place=Edinburgh|publisher=Churchill Livingstone|language=en|isbn=978-0-7020-3398-8|access-date=2021-01-26|last2=Roberts|first2=Eve A.|editor2-last=Portmann|editor2-first=Bernard C.|editor3-last=Ferrell|editor3-first=Linda D.}}</ref> Accessory hepatic ducts may also instead open into the cystic duct or gallbladder.'''<ref name=":0220222" />'''

Occasionally, the cystic duct may first run along the right side of the common bile duct for some distance before joining it, or may pass posteriorly around to the common hepatic duct to unite with it from the left side.'''<ref name=":0220222" />'''

Rarely, the common hepatic duct and gallbladder joing directly (with the cystic duct being absent),<ref name=":0" />'''<ref name=":0220222" />''' leading to illness.<ref name=":0" />

A diameter of more than 8&nbsp;mm is regarded as abnormal dilatation, and is a sign of [[cholestasis]].<ref name="HoeffelAzizi2006">{{cite journal|last1=Hoeffel|first1=Christine|last2=Azizi|first2=Louisa|last3=Lewin|first3=Maité|last4=Laurent|first4=Valérie|last5=Aubé|first5=Christophe|last6=Arrivé|first6=Lionel|last7=Tubiana|first7=Jean-Michel|title=Normal and Pathologic Features of the Postoperative Biliary Tract at 3D MR Cholangiopancreatography and MR Imaging|journal=RadioGraphics|volume=26|issue=6|year=2006|pages=1603–1620|issn=0271-5333|doi=10.1148/rg.266055730|doi-access=free|pmid=17102039}}</ref>

* [http://www.medterms.com/script/main/art.asp?articlekey=26032 Illustration] {{Webarchive|url=https://web.archive.org/web/20121020150714/http://www.medterms.com/script/main/art.asp?articlekey=26032 |date=2012-10-20 }}