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      Vascular anatomy of the splenic flexure, focusing on the accessory middle colic artery and vein

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          Evaluation of lymph flow patterns in splenic flexural colon cancers using laparoscopic real-time indocyanine green fluorescence imaging

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            Riolan's arch: confusing, misnomer, and obsolete. A literature survey of the connection(s) between the superior and inferior mesenteric arteries.

            There are 2 interpretations of Riolan's arch: (1) Riolan's arch is identical to a central part of the marginal artery (MA), connecting the superior (SMA) and the inferior mesenteric (IMA) arteries; and (2) Riolan's arch represents a rare artery, connecting the SMA and the IMA. The current review aims to emphasize the clinical importance of the colon's vasculature and to show the feasibility of abolishing the terms "Riolan's arch" and "meandering mesenteric artery." A literature survey was performed. It appears that no distinct identity can be ascribed to Riolan's arch and that the "meandering mesenteric artery" represents an angiographically hypertrophied MA and/or the ascending branch of the left colic artery. However, a rare, centrally located, communicating artery has been described. Generally, the MA is sufficient for left colic circulation after ligation of the IMA, but at the splenic flexure, patency of the ascending branch of the left colic artery can be primordial. As connections between the SMA and the IMA can be adequately described using structures mentioned in Terminologica Anatomica, the terms "Riolan's arch" and "meandering mesenteric artery" should be abolished.
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              Anatomy of the inferior mesenteric artery evaluated using 3-dimensional CT angiography.

              The branching of the inferior mesenteric artery and vein varies among individuals. Three-dimensional CT angiography is a less invasive modality than traditional angiographic examination to assess the artery and vein.
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                Author and article information

                Journal
                Colorectal Disease
                Colorectal Dis
                Wiley
                1462-8910
                1463-1318
                April 2020
                November 17 2019
                April 2020
                : 22
                : 4
                : 392-398
                Affiliations
                [1 ]Department of Surgical Oncology Faculty of Medicine The University of Tokyo Tokyo Japan
                Article
                10.1111/codi.14886
                © 2020

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