Calot triangle

Calot triangle is a small (potential) triangular space at the porta hepatis of surgical importance as it is dissected during cholecystectomy. Its contents, the cystic artery and cystic duct must be identified before ligation and division to avoid damaging them during the operation.

Gross anatomy


The triangle is positioned so the apex points towards the liver with the boundaries:

  • right: the cystic duct which is often tortuous and has a beaded appearance, passes downward and to the left to join the common duct
  • left: common hepatic duct
  • superior: the inferior surface of the liver (in the original description by Calot the cystic artery is defined as the superior margin)
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Article information

rID: 40294
Section: Anatomy
Tag: anatomy
Synonyms or Alternate Spellings:
  • Hepatocystic triangle
  • Calot's triangle

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