Triangle of Calot

Other Known Aliases none

Definitionanatomic space bordered by the cystic duct (inferiorly), common hepatic duct (medially) and cystic artery (superiorly)

Clinical Significance this anatomic space is where you can see lymphadenopathy in patients with cholecystitis. This is often confused with the cystohepatic triangle (read more here).

HistoryNamed after Jean-François Calot (1861-1944), who was a French surgeon and received his medical doctorate from Saine-Pe de Bigorre in 1880. He would go on to have a modest career in the field of orthopaedic surgery, and is known for describing the treatment of spinal deformities in Pott’s Disease. He would describe his eponymonic area in his doctoral thesis defense in 1891.


  1. Firkin BG and Whitwirth JA.  Dictionary of Medical Eponyms. 2nd ed.  New York, NY; Parthenon Publishing Group. 1996.
  2. Bartolucci S, Forbis P.  Stedman’s Medical Eponyms.  2nd ed.  Baltimore, MD; LWW.  2005.
  3. Yee AJ, Pfiffner P. (2012).  Medical Eponyms (Version 1.4.2) [Mobile Application Software].  Retrieved http://itunes.apple.com.
  4. Whonamedit – dictionary of medical eponyms. http://www.whonamedit.com
  5. Up To Date. www.uptodate.com
  6. Calor JF, De la cholécystectomie. Doctoral thesis, Paris, 1891.

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