{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,19]],"date-time":"2026-07-19T19:01:48Z","timestamp":1784487708307,"version":"3.55.0"},"reference-count":20,"publisher":"Springer Science and Business Media LLC","license":[{"start":{"date-parts":[[2026,7,19]],"date-time":"2026-07-19T00:00:00Z","timestamp":1784419200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2026,7,19]],"date-time":"2026-07-19T00:00:00Z","timestamp":1784419200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"DOI":"10.13039\/501100005639","name":"Universidade De S\u00e3o Paulo","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100005639","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Int Urol Nephrol"],"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>To compare perioperative and long-term outcomes of laparoscopic ureterocalicostomy (UC) performed as a primary-versus-rescue reconstruction after failed prior repair in complex upper urinary tract obstruction.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      We retrospectively reviewed a prospectively maintained single-institution database of 24 patients who underwent laparoscopic UC between January 2008 and August 2024; UC was decided intraoperatively when conditions precluded safe pyeloplasty. The comparison was restricted to primary ureteropelvic junction obstruction (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200923): rescue UC after failed prior repair (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200912) versus primary UC without previous repair (\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200911). Demographics, operative data, complications, split renal function (DTPA scintigraphy), serum creatinine\/eGFR, and symptom resolution were compared between and within groups.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The cohort was predominantly adult (33% younger than 18). The two groups were comparable in age, symptom duration, operative time, blood loss, and hospital stay (all\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&gt;\u20090.4). Pre- and postoperative split renal functions were comparable between groups (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.35 and\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.97) and remained stable within both groups (40.0\u2009\u00b1\u200920.6% to 43.2\u2009\u00b1\u200918.5% overall). There were no conversions and only minor complications. At a median follow-up of 60\u00a0months, 22 of 24 patients (91.6%) achieved resolution of the obstruction. The two adverse outcomes were one primary failure (excluded patient, nephrectomy) and one late recurrence at 18\u00a0months. At last follow-up, 22 of 24 patients (91.6%) had durable resolution of the obstruction. There were two adverse outcomes of different nature: one primary failure (the excluded patient, who never improved and required nephrectomy) and one late recurrence in the primary group, in a patient with initial resolution who restenosed at 18\u00a0months; both related to complex calyceal anatomy.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Laparoscopic UC provided durable long-term resolution of obstruction whether performed as a primary or a rescue reconstruction. UC is a reliable option in both unoperated and redo settings when pyeloplasty is unsafe, provided that calyceal anatomy is carefully assessed.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1007\/s11255-026-05276-0","type":"journal-article","created":{"date-parts":[[2026,7,19]],"date-time":"2026-07-19T18:06:53Z","timestamp":1784484413000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Primary versus rescue laparoscopic ureterocalicostomy for complex upper urinary tract obstruction: a single-center series with long-term follow-up"],"prefix":"10.1007","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1793-1931","authenticated-orcid":false,"given":"Henri Luiz","family":"Morgan","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Filipe","family":"de Arruda Pessoa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1137-8709","authenticated-orcid":false,"given":"Eduardo","family":"Riccetto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5887-5617","authenticated-orcid":false,"given":"Patr\u00edcia Rodrigues","family":"Candido","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8346-3833","authenticated-orcid":false,"given":"Victor","family":"Srougi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9870-7682","authenticated-orcid":false,"given":"Francisco Tibor","family":"D\u00e9nes","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7395-8370","authenticated-orcid":false,"given":"William Carlos","family":"Nahas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2577-119X","authenticated-orcid":false,"given":"Marco Antonio","family":"Arap","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,7,19]]},"reference":[{"issue":"6","key":"5276_CR1","first-page":"351","volume":"52","author":"K Neuwirt","year":"1948","unstructured":"Neuwirt K (1948) Implantation of the ureter into the lower calyx of the renal pelvis. 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