Hepatobiliary triangle

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The hepatobiliary triangle is an anatomic space bordered by the common hepatic duct medially, the cystic duct inferiorly and the liver superiorly. The cystic artery normally passes through the triangle; this anatomic feature is important during laparoscopic cholecystectomies [1].

Another name used to refer to this region is Calot's Triangle. General surgeons frequently quiz medical students on this term and the name for the lymph node located within the triangle, Calot's Node. The latter is frequently enlarged due to inflammation of the gallbladder (e.g. cholecystitis) or the biliary tract (e.g. choledocholithiasis) and is removed along with the gallbladder during surgical treatment (cholecystectomy).


  1. Balija M, Huis M, Nikolic V, Stulhofer M. Laparoscopic visualization of the cystic artery anatomy. World J Surg. 1999 Jul;23(7):703-7. PMID 10390590