{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T05:02:53Z","timestamp":1790226173227,"version":"4.1.0"},"reference-count":44,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:00:00Z","timestamp":1790208000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Nephrol."],"abstract":"<jats:sec>\n                    <jats:title>Introduction<\/jats:title>\n                    <jats:p>Kidney transplantation remains the preferred treatment for end-stage renal disease; however, the increasing use of extended-criteria donors has been associated with a higher incidence of postoperative complications.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>We retrospectively analyzed 471 kidney transplant recipients at the University of Cologne between 2012 and 2022 to evaluate the incidence, risk factors, clinical outcomes, and surgical management of ureteral stenosis.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Ureteral stenosis occurred in 6.37% and was significantly associated with older donor age within the extended-criteria donor range (65 vs. 56 years, p = 0.006), multiple renal arteries (33.3% vs. 10.2%, p &amp;lt; 0.001), and BK virus infection, as reflected by higher rates of BK viruria (26.7% vs. 7.0%, p = 0.002) and BK viraemia (26.7% vs. 8.6%, p = 0.005). Renal function was significantly impaired in recipients with ureteral stenosis at 6 months, 1 year, and 2 years after transplantation. Death-censored graft survival was significantly lower in the stenosis group (79.7% vs. 93.3%, p = 0.01).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Discussion<\/jats:title>\n                    <jats:p>Ureteral transposition and ureteroneocystostomy demonstrated comparable outcomes, long-term renal function and graft survival supporting individualization of surgical technique based on anatomical and patient-specific factors.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.3389\/fneph.2026.1943229","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T04:38:36Z","timestamp":1790224716000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Post-transplant ureteral stenosis: donor-related risk factors, graft outcome and surgical management"],"prefix":"10.3389","volume":"6","author":[{"given":"T.","family":"Wagner","sequence":"first","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]},{"name":"Department of Surgery, Beth Israel Deaconess Medical Center, Harvard University","place":["Boston, MA, United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hauke","family":"Heinrich","sequence":"additional","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.","family":"Schober","sequence":"additional","affiliation":[{"name":"Max-Planck-Institute for Biology of Ageing, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.","family":"Ischebeck","sequence":"additional","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Schleussner","sequence":"additional","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Hummels","sequence":"additional","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F. C.","family":"Koehler","sequence":"additional","affiliation":[{"name":"Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]},{"name":"Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Faculty of Medicine, University of Cologne","place":["Cologne, Germany"]},{"name":"Department of Internal Medicine (Nephrology) & Einthoven Laboratory of Vascular and Regenerative Medicine, Leiden University Medical Center","place":["Leiden, Netherlands"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"Kurschat","sequence":"additional","affiliation":[{"name":"Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Kann","sequence":"additional","affiliation":[{"name":"Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"C.","family":"Bruns","sequence":"additional","affiliation":[{"name":"Department of General, Visceral, Thoracic and Transplant Surgery, University of Cologne, Faculty of Medicine and University Hospital Cologne","place":["Cologne, Germany"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"D. 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