RT Journal Article SR Electronic T1 Impact of Inferior Mesenteric Artery Occlusion on the Calibre of Collateral Arteries of the Colon JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 5189 OP 5193 DO 10.21873/anticanres.15337 VO 41 IS 10 A1 TETSUHIRO IIDA A1 KOJI MURONO A1 HIROSHI SHIRATORI A1 HIROAKI NOZAWA A1 KAZUSHIGE KAWAI A1 KAZUHITO SASAKI A1 SHIGENOBU EMOTO A1 JUNKO KISHIKAWA A1 HIROAKI ISHII A1 YUICHIRO YOKOYAMA A1 SHINYA ABE A1 YUZO NAGAI A1 HIROYUKI ANZAI A1 HIROFUMI SONODA A1 TOSHIO TAKAYAMA A1 KATSUYUKI HOSHINA A1 SOICHIRO ISHIHARA YR 2021 UL http://ar.iiarjournals.org/content/41/10/5189.abstract AB Background/Aim: The inferior mesenteric arteries (IMA) are occluded in some colorectal cancer patients. This study evaluated the impact of IMA occlusion on the calibre of collateral arteries. Patients and Methods: As an IMA obstruction model, 20 patients who underwent abdominal aortic aneurysm surgery, with ligated, excluded, or embolised IMA, were enrolled. Changes in the calibre of the left colic arteries (LCAs) and marginal arteries after surgeries were evaluated. Results: The cross-sectional area of the LCA significantly increased after surgery (4.34 mm2 vs. 6.34 mm2, p=0.0009) and that of the marginal artery did not change significantly (2.69 mm2 vs. 3.01 mm2, p=0.33). Conclusion: The calibre of the LCA increased after IMA occlusion. The descending branch of the LCA should be confirmed preoperatively to preserve blood flow during a low tie procedure.