Passaro's triangle

Passaro's triangle or gastrinoma triangle is a presumptive region in the abdomen between three points:

  1. Superior—porta hepatis[1] (earlier—confluence of the cystic and common bile duct),[2]
  2. Inferior—junction of the second and third portion of duodenum,[2] and
  3. Medial—junction of the neck and body of the pancreas[2]

The importance of the triangle is because it is known as the source of origin of most gastrinomas.[3][4] However, primary gastrinomas can also occur in the liver or extrahepatic bile ducts, commonly with metastasis to the local lymph nodes.[5]

The appellation is due to Edward Peter Passaro, an American surgeon, who explained it for the first time.[3]

References
  1. Yang, Rong-Hsin; Chu, Yum-Kung (2015). "Zollinger-Ellison syndrome: Revelation of the gastrinoma triangle". Radiology Case Reports. 10 (1). doi:10.2484/rcr.v10i1.827. 827.
  2. Stabile, Bruce E.; Morrow, Douglas J.; Passaro Jr., Edward (1984). "The gastrinoma triangle: Operative implications". The American Journal of Surgery. 147 (1): 25–31. doi:10.1016/0002-9610(84)90029-1.
  3. Weerakkody, Yuranga. "Gastrinoma triangle - Radiology Reference Article - Radiopaedia.org". Radiopaedia.org. Retrieved 30 November 2018.
  4. Yagnik, Vipul (30 November 2018). Fundamentals of Operative Surgery. BI Publications Pvt Ltd. p. 170. ISBN 9788172253004. Retrieved 30 November 2018 – via Google Books.
  5. Norton, Jeffrey A.; Foster, Deshka S.; Blumgart, Leslie H.; Poultsides, George A.; Visser, Brendan C.; Fraker, Douglas L.; Alexander, H. Richard; Jensen, Robert T. (2018). "Incidence and Prognosis of Primary Gastrinomas in the Hepatobiliary Tract". JAMA Surgery. 153 (3). doi:10.1001/jamasurg.2017.5083. e175083.
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