Common bile duct
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The common bile duct (CBD), which is sometimes simply known as the bile duct, is formed by the union of the cystic duct and common hepatic duct.
Gross anatomy
The CBD is approximately 8 cm long and usually <6 mm wide in internal diameter but this can be dependent on a number of factors including age and prior cholecystectomy. It joins the pancreatic duct at the ampulla of Vater, which drains into the second part of the duodenum through the major duodenal papilla.
Arterial Supply
The common bile duct is supplied by a network of arteries from several sources:
- from above: right hepatic artery and cystic artery
- from below: posterior superior pancreaticoduodenal artery, retroduodenal artery, and retroportal artery
Variant anatomy
There are four main relationships of the CBD with the pancreatic head 2:
- partially covered posteriorly (most common: ~50%)
- completely covered
- completely uncovered
- CBD may pass laterally to the pancreatic head (least common)
Related pathology
-<p>The <strong>common bile duct (CBD</strong>), which is sometimes simply known as the <strong>bile duct</strong>, is formed by the union of the <a href="/articles/cystic-duct">cystic duct</a> and <a href="/articles/common-hepatic-duct">common hepatic duct</a>. </p><h4>Gross anatomy</h4><p>The CBD is approximately 8 cm long and usually <6 mm wide in diameter but this can be dependent on a number of factors including age and prior cholecystectomy. It joins the <a href="/articles/pancreatic-ducts">pancreatic duct</a> at the <a href="/articles/ampulla-of-vater-1">ampulla of Vater</a>, which drains into the second part of the <a href="/articles/duodenum">duodenum</a> through the major duodenal papilla.</p><h4>Arterial Supply</h4><p>The common bile duct is supplied by a network of arteries from several sources:</p><ul>- +<p>The <strong>common bile duct (CBD</strong>), which is sometimes simply known as the <strong>bile duct</strong>, is formed by the union of the <a href="/articles/cystic-duct">cystic duct</a> and <a href="/articles/common-hepatic-duct">common hepatic duct</a>. </p><h4>Gross anatomy</h4><p>The CBD is approximately 8 cm long and usually <6 mm wide in internal diameter but this can be dependent on a number of factors including age and prior cholecystectomy. It joins the <a href="/articles/pancreatic-ducts">pancreatic duct</a> at the <a href="/articles/ampulla-of-vater-1">ampulla of Vater</a>, which drains into the second part of the <a href="/articles/duodenum">duodenum</a> through the major duodenal papilla.</p><h4>Arterial Supply</h4><p>The common bile duct is supplied by a network of arteries from several sources:</p><ul>
Images Changes:
Image 4 MRI (MRCP-Thick Slab) ( create )
Image 5 MRI (T2) ( create )
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