Celiacomesenteric trunk and arc of Riolan

Case contributed by Dr Bruno Di Muzio


Hepatic perfusion disorder in previous tomography.

Patient Data

Age: 80 years
Gender: Female

Celiac 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). 

Highlighting the arc of Riolan

Annotated image

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 celiac artery and SMA is called as coeliaco-mesenteric trunk, and it represents < 1% of celiac artery variants. 

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.