Inclusive Anatomy
Historical Timeline
1800
1900s
Present
1891
1900s
Jean Francois Calot
Calot described the triangular anatomical space in his 1891 doctoral thesis on cholecystectomy, defining it as bounded by the cystic duct, common hepatic duct, and cystic artery.[1]
Various Anatomists
As surgical anatomy evolved and the variability of the cystic artery became recognized, anatomists revised the superior boundary to the inferior surface of the liver, establishing the modern definition of the cystohepatic triangle.[2]
Reinier de Graaf
With the advent of laparoscopic cholecystectomy, the triangle became central to safe biliary surgery and to the development of structured dissection principles.[3]
Eponym:
The cystohepatic triangle is eponymously known as the Triangle of Calot, named after Jean-François Calot (1861–1944), a French surgeon.[1] Calot completed his doctoral thesis in 1891, during which he described this anatomical region in the context of cholecystectomy.[1] His work contributed to the early standardization of hepatobiliary surgical anatomy and influenced subsequent refinements in operative technique.
Scientific Contributions:
Jean-François Calot’s principal contribution to medicine was his detailed anatomical and surgical analysis of the hepatobiliary region.[1] At a time when cholecystectomy was still developing as a surgical procedure, Calot emphasized the importance of precise identification and careful dissection of biliary structures to minimize operative complications.
Although later anatomical refinements modified the superior boundary of the triangle, Calot’s identification of this region as a critical operative zone remains foundational in hepatobiliary surgery.[2,3]
Jean Francois Calot- Image Obtained From: Wikimedia Commons (Public Domain)
References
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Calot JF. De la cholécystectomie. Paris; 1891.
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Hugh TB. New strategies to prevent laparoscopic bile duct injury—surgeons can learn from pilots. Surgery. 2002;132(5):826-835. https://pubmed.ncbi.nlm.nih.gov/12464867/
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Strasberg SM, Hertl M, Soper NJ. An analysis of the problem of biliary injury during laparoscopic cholecystectomy. J Am Coll Surg. 1995;180(1):101-125. https://pubmed.ncbi.nlm.nih.gov/8000648/
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