The Arc of Buhler (or "Buhler's anastamotic artery") is an uncommonly encountered vascular channel linking the celiac system and the superior mesenteric system. Normally, the two systems are connected through the gastroduodenal artery and pancreaticoduodenal arcade, and through the dorsal main pancreatic artery, but occasionally an embryonic anastomosis between the two persists, and can become an important collateral pathway for flow with stenosis of either artery.
The incidence of the Arc of Buhler ranges from 1-4% in the few studies investigating it, and its diameter has been assessed at 1.5 - 2.5 mm.
Although noting its presence can be significant for preoperative planning or pre-TACE planning., aneurysms of the Arc of Buhler have also been reported, and treated with coil embolization.
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1. Saad WE, Davies MG, Sahler L, et al. "Arc of Buhler, incidence and Diameter in Asymptomatic Individuals" Vascular and Endovascular Surgery. 39:4 (2005) pp. 346-349
2. Dubel GJ, Ahn SO, Saeed MA. "Interventional Management of the Arc of Buhler Aneurysm" Seminars in Interventional Radiology. 24:1 (2007) pp. 76-81.