Coeliaco-mesenteric trunk and arc of Riolan

Case contributed by Dr Bruno Di Muzio


Hepatic perfusion disorder in previous tomography.

Patient Data

Age: 78
Gender: Female

Coeliac trunk agenesis. A common artery that continues as SMA generates tortuous CHA and SA (coeliaco-mesenteric trunk). There is an artery that connects the proximal SMA to the proximal IMA (Arc of Riolan). 

Annotated image

Highlighting the arc of Riolan

Highlighting the arc of Riolan. 

Case Discussion

Arc of Riolan is an inconstant artery that connects the proximal superior mesenteric artery (SMA) or one of its primary branches to the proximal inferior mesenteric artery (IMA) or one of its primary branches.  

The common origin of coeliac artery and SMA is called as coeliaco-mesenteric trunk, and it represents < 1% of coeliac artery variants. 

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Case information

rID: 29608
Case created: 8th Jun 2014
Last edited: 7th Feb 2017
System: Vascular
Inclusion in quiz mode: Included

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