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The confluence of the cystic duct and the common hepatic duct forms the common bile duct (CBD). The cystic duct is approximately 2-3 cm long and 2-3 mm in diameter.
The cystic artery (branch of right hepatic artery) can often travel behind the cystic duct to supply the gallbladder.
There are three main variations of the cystic duct 3:
- low cystic duct insertion: into the distal-third of the CHD (~10%)
- medial cystic duct insertion: into the left, not the right, side of the CHD (~15%)
- parallel cystic duct course: courses parallel to the CHD for at least 2 cm (~10%)
Conditions that may affect the cystic duct include:
- 1. Sinnatamby, C, & Last, R 1999, Last's Anatomy : Regional And Applied, n.p.: Edinburgh ; New York : Churchill Livingstone, 1999.
- 2. Turner MA, Fulcher AS. The cystic duct: normal anatomy and disease processes. (2001) Radiographics : a review publication of the Radiological Society of North America, Inc. 21 (1): 3-22; questionnaire 288-94. doi:10.1148/radiographics.21.1.g01ja093 - Pubmed
- 3. Mortelé KJ, Ros PR. Anatomic variants of the biliary tree: MR cholangiographic findings and clinical applications. AJR Am J Roentgenol. 2001;177 (2): 389-94. doi:10.2214/ajr.177.2.1770389 - Pubmed citation
- 4. Wu YH, Liu ZS, Mrikhi R et-al. Anatomical variations of the cystic duct: two case reports. World J. Gastroenterol. 2008;14 (1): 155-7. Free text at pubmed - Pubmed citation