When present, the arc of Riolan is an important connection between the SMA and IMA in the setting of arterial occlusion or significant stenosis. In proximal SMA. embryologic development of the mesenteric structures and their blood . collaterals include the arch of Bühler and gastroduodenal arcade. SMA to inferior mesenteric artery (IMA) collaterals include the arc of Riolan and the marginal artery of. The marginal artery of Drummond is the major collateral arcade between the SMA and IMA, is Differentiation of the Arc of Riolan from the Marginal artery of.

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The transition zone between descending colon and sigmoideum colon is supplied jointly by colon sigmoideum artery and ACS, and the tumors rapidly grow to induce the compensatory blood supply in collateral circulation [ 16 ]. Articles Cases Courses Quiz. Radiol Clin North Am. In our standard CT protocol for abdomen examinations, dual scan gram area from Diaphragm to the pubic symphysis in a supine position was arcsde as field of view FOV. Lumbar branch Iliac branch.

Marginal artery of the colon

According to the location of the stenosis, the direction of blood flow may be anterograde or retrograde [ 2 riola. Inferior epigastric Corona mortis Deep circumflex iliac Femoral see arteries of lower limbs.

Assessment of aortic pathology and peripheral arterial disease using multidetector computed tomographic angiography. As a result, 47 subjects consisted of 27 males and 20 females age range years, mean 50 years were selected into the control group.


A control group was sampled from patients without vasodilation of the arc, exclusion criteria including: Internal iliac Posterior surface Iliolumbar Lumbar branch Iliac branch. Marginal artery of the colon Frontal view of the abdominal aorta and the territory supplied by the inferior mesenteric artery. The average diameter of arc of Riolan was measured.

A literature survey of the connection s between the superior and inferior mesenteric arteries. In distal abdominal aortic occlusion, it provides collateral flow from SMA to IMA to iliac vessels via the superior rectal artery and then to the lower limbs via the external iliac artery.

dw In fact, the intestinal artery blood flow rely mainly on its own pressure difference, may also be affected by the postures, eating, etc besides. Doppler US of superior mesenteric artery in the assessment of ulcerative colitis. Considering the invasion and complications of DSA, many researches focus on the application of CT angiography on the studying of vascular structures in many diseases [ 4 – 6 ].

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Frontal view of the abdominal aorta and the territory supplied by the inferior mesenteric artery. Author information Article notes Copyright and License information Disclaimer. Ltd, Tokyo, Japanrespectively. Along with branches of the internal iliac arteriesalso known as Cherbanyk’s arteries, it is usually arcadr large to supply the oxygenated blood to the large intestine covered by the inferior mesenteric artery and is a reason that in abdominal aortic aneurysm repair the inferior mesenteric artery does not have to be re-implanted re-attached into the repaired abdominal aorta.

Second, celiac and mesenteric artery variation situation did not be considered in our paper.

Arc of Riolan | Radiology Reference Article |

Recessive AOR is the common state, with small amount of blood or even without blood inside of it. In human anatomy, the marginal artery of the colonalso known as the marginal artery of Drummond and artery of Drummond is an artery that connects the inferior mesenteric artery with the superior mesenteric artery.


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When present, the arc of Riolan is xe important connection between the SMA and IMA in the setting of arterial occlusion or significant stenosis. In case of IMA stenosis or obstruction, SMA will supply blood via arc of Riolan to the left hemicolon and to some branches in left internal iliac artery.

Vascular diameter measurement in CT angiography: The expansion of arc of Riolan was the most significant following obstruction of SMA.

We retrospectively analyzed patients clinically suspected as aorta or abdominal arcdae lesions and received CTA in aorta abdominal or mesenteric artery between June and June Inferior pancreaticoduodenal Intestinal jejunal ileal arcades vasa recta Ileocolic colic anterior cecal posterior cecal ileal branch appendicular Right colic Middle colic Marginal.

Int J Clin Exp Med. Results Large-scale cases were examined.

The reasons causing stenosis or obstruction of SMA or IMA include atherosclerosis, mesenteric artery embolism, aorta lesions, and arteritis. Computed tomography angiography of the renal and mesenteric vasculature: Portal venous phase acquisition was set 25 sec delay after the previous protocol.

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