{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T11:53:31Z","timestamp":1791287611937,"version":"4.1.0"},"reference-count":31,"publisher":"Springer Science and Business Media LLC","license":[{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Surg Today"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>Persistent descending mesocolon (PDM) is a rare congenital anomaly characterized by a medial shift of the descending colon and vascular variations that can complicate colorectal surgery. This study aimed to clarify the PDM-associated vascular anatomy and describe the short-term outcomes of robot-assisted surgery.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We retrospectively analyzed 541 patients with primary rectal cancer who underwent robot-assisted surgery (2017\u20132024) and compared the short-term outcomes between the PDM and non-PDM groups. The vascular anatomy, including inferior mesenteric artery (IMA) branching patterns and marginal artery defects, was assessed in 501 patients using preoperative enhanced computed tomography.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>PDM was identified in 22 patients (4.1%) in this study. The short-term outcomes were comparable between the groups. The PDM group had a significantly higher prevalence of radial IMA branching patterns and a higher frequency of marginal artery defects than the non-PDM group (9% vs. 2%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>PDM is associated with a higher prevalence of radial IMA branching patterns. Marginal artery defects were observed more frequently among patients with PDM; however, this finding requires cautious interpretation because of the small number of affected cases and potential verification bias. Appropriate identification and management of vascular variations may contribute to acceptable short-term outcomes of robot-assisted surgery in patients with PDM.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s00595-026-03444-4","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T11:17:02Z","timestamp":1791285422000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Robot-assisted surgery for rectal cancer with persistent descending mesocolon: analysis of vascular anatomical features and short-term outcomes"],"prefix":"10.1007","author":[{"given":"Aya","family":"Narumi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3380-7233","authenticated-orcid":false,"given":"Marie","family":"Hanaoka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shunsaku","family":"Nakagawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mari","family":"Nakagawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shinichi","family":"Yamauchi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroyasu","family":"Kagawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masanori","family":"Tokunaga","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusuke","family":"Kinugasa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"3444_CR1","first-page":"197","volume":"110","author":"L Morgenstern","year":"1960","unstructured":"Morgenstern L. 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Masanori Tokunaga received speaker honoraria from Johnson & Johnson KK, Medtronic Japan, Olympus, and Intuitive Surgical. Hiroyasu Kagawa received speaker honoraria from Johnson & Johnson KK and Intuitive Surgical. The other authors have no conflicts of interest, funding, or other sources of support to declare in connection with this study.","order":1,"name":"Ethics","label":"Conflicts of interest and Source of Funding","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All procedures in this retrospective study were performed according to the ethical standards of our institution\u2019s Committee on Human Experimentation and were compliant with the Helsinki Declaration of 1964 and its later versions. Following personal information protection laws, patients were given the opportunity to opt out of the study through public announcements published by our institution. The Science Tokyo Hospital Institutional Ethics Committee approved the study protocol (approval number: M2000-831).","order":2,"name":"Ethics","label":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}}]}}