Evaluation of characteristics of left-sided colorectal perfusion in elderly patients by angiography

Figure 5 Patterns of the arterial arch connecting the superior mesenteric artery and inferior mesenteric artery, including the arc of Riolan (meandering mesenteric artery), Drummond’s artery (marginal artery), and ascending left colic artery. A: Illustration of the arc of Riolan and Drummond’s artery; B: Angiography of IMA trunk occlusion with the arc of Riolan and Drummond’s artery; C: Angiography of SMA trunk occlusion with an abnormally enlarged arc of Riolan and Drummond’s artery; D: Illustration of the aLCA; E: Angiography of the normal Drummond artery with the aLCA to the transverse colon; F: Angiography of the aLCA with an incomplete Drummond artery. IMA: Inferior mesenteric artery; SMA: Superior mesenteric artery; SRA: Superior rectal artery; SA: Sigmoid artery; LCA: Left colic artery; aLCA: Ascending left colic artery; MCA: middle colic artery.