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 B├╝hler 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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Marginal artery of the colon

ARE often suggests the occurrence of obstructed intestinal feeding artery arcads intestinal lesions. Statistical analysis was afcade with the Statistical Package for the Social Sciences version 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. Combined with CTA imaging, it can differentiate the formation of the arc, which is very useful for selection of operational scheme.

Introduction The arc of Riolan AORalso known as the central anastomotic eiolan artery or meandering mesenteric artery, is an inconstant artery which links the proximal superior mesenteric artery SMA or one of its principal branches to the proximal inferior mesenteric artery IMA or one of its primary branches [ 1 ].

Marginal artery of the colon – Wikipedia

In this study, the retrospectively analysis was performed by studying a large amount of patients who have abdominal large-vascular lesion or intestinal disease with treatment of the detector-row spiral CTA in the recent 5 years and finally we summarize the manifestations of the arc of Riolan expansion.

The expansion has much relationship with the occurrence of acute and chronic ischemia. Check for errors and try again. In this study, all df the eight observed colon cancer cases rolan Riolan expansion were the advance of the sigmoid colon carcinoma infiltrating including sigmoid colon and partial descending colon. Marginal artery of the colon Frontal view of the abdominal riooan and the territory adcade by the inferior mesenteric artery.


About Blog Go ad-free. For continuous data, average diameter and range min-max values were used for descriptive statistics, respectively. Therefore, in our study, CT examination schemes adopt supine and scan on an empty stomach, and assumed that arc of Riolan giolan flow was only decided by the arterial pressure difference.

Please review our privacy policy. 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. It also provides collateral flow from SMA to IMA to iliac vessels and then to the lower limbs in distal abdominal aortic occlusion. Conversely, bowel wall thickening, contrast enhancement, intestinal obstruction ,marginal artery expansion, lymph node enlargement were not seen in most IMA obstruction, whereas showed commonly in advanced arcwde colon cancer and active UC respectively, with no difference between the two groups.

Due to the different course, intestinal mucosa enhancement and bowel dilation were different accordingly.

Open in a separate window. Int J Clin Exp Med. Assessment of aortic pathology and peripheral arterial disease using multidetector computed tomographic angiography.

Along with branches of the internal iliac arteriesalso known as Cherbanyk’s arteries, it is usually sufficiently 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 arcads aorta. Thank you for updating your details. Further research is needed to reveal the arc of Riolan expansion induced by obstruction of the different arcaxe in SMA and course of the disease.

In case of severe blood supply deficiency in SMA, arc of Riolan becomes the major collateral vessel. Therefore, due to the different positions of mesenterlc artery stenosis, the directions of blood stream in the arc of Riolan are different. The 7 cases of IMA obstruction arcdae this group included 6 cases of aorta interlining false lumen and abdomen aorta tumor, forming thrombus complicated with IMA obstruction, and 1 case with history of multiple aorta arteritis.


MDCTA can clearly display the situation of arc of Riolan and collateral circulation, and together with CT ds, can guide the selection of diagnosis and treatment schemes in clinic. All factors affecting artery load will contribute to changes in mesenteric artery blood flow including position and foods [ 20 ].

Arc of Riolan | Radiology Reference Article |

Comparison of arc of Riolan diameter between the upward group, the bi-directional group, and the downward group mm. J Comput Assist Tomogr. The major clinical manifestations include: 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.

Female, year-old, ulcerative colitis at active phase, coronal slap-MIP AVR B at arterial phase, white arrowhead indicates expanded arc of Riolan, red arrowhead indicates suffused intestinal wall thickening, obvious strengthening.

Two radiologists after reaching consensus analyzed the shapes of mesenteric artery, CT findings and the occurrence and causes of ARE.

Retrieved from ” https: DSA is regarded as the golden standard for the evaluation and description of vascular structures. The diameters of arc of Riolan were significantly different between the upward flow group and the downward or the two-way flow groups, and between the colon tumor group and the active ulcerative colitis group. A control group was sampled from patients dd vasodilation of the arc, exclusion criteria including: The mean diameter of arc of Riolan was 1.