{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,8]],"date-time":"2026-11-08T00:23:19Z","timestamp":1794097399387,"version":"4.8.0"},"reference-count":19,"publisher":"SAGE Publications","issue":"12","license":[{"start":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T00:00:00Z","timestamp":1787702400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Endourology"],"published-print":{"date-parts":[[2026,12,1]]},"abstract":"\n Objective:<\/jats:title>\n Patients with ureteropelvic junction obstruction (UPJO) present with varying degrees of hydronephrosis preoperatively and many heal with persistent hydronephrosis postoperatively despite a successful pyeloplasty, the significance of which is poorly understood. The study aims to illustrate the natural history of pre- and post-pyeloplasty hydronephrosis and determine whether degree of hydronephrosis is predictive of pyeloplasty failure in the adult population.<\/jats:p>\n <\/jats:sec>\n \n Methods:<\/jats:title>\n \n We retrospectively reviewed patients 18+ years old who underwent robotic pyeloplasty for UPJO with available imaging at our institution in 2014\u20132024. Hydronephrosis categories were obtained from radiology reports: none (Group 1), mild (2), moderate (3), and severe (4). Anteroposterior diameter (APD) of renal pelvis was measured in mid-transverse view. Failure was defined as radiographically confirmed UPJO recurrence requiring intervention.\n p<\/jats:italic>\n < 0.05 was considered statistically significant.\n <\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n \n One hundred and ten patients were included, with pyeloplasty at median age of 52 years and pain as presentation in 66%. Median follow-up was 22 months. 8 patients had a failed pyeloplasty at median 5 months. 34% of patients had persistent hydronephrosis (88% in failure group\n vs<\/jats:italic>\n 29% in success). Median time to maximal APD decrease was 9 months (4 months for preoperative Group 1, 9 months for Group 2, 16 months for Group 3, and 10 months for Group 4,\n p<\/jats:italic>\n = 0.3). Conversion to Group 1 postoperatively was 92% for preoperative Group 2, 67% for Group 3, and 54% for Group 4. Postoperative, not preoperative, degree of hydronephrosis was associated with pyeloplasty failure (\n p<\/jats:italic>\n = 0.002\n vs<\/jats:italic>\n 0.564).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n Persistent hydronephrosis is common, affecting one-third of patients long-term despite successful pyeloplasty. Imaging surveillance of postoperative hydronephrosis remains valuable, as its severity is associated with pyeloplasty failure, with most failures becoming evident within 5 months. Patients should be counseled on the expected timeline of hydronephrosis resolution to avoid unnecessary anxiety and workups.<\/jats:p>\n <\/jats:sec>","DOI":"10.1177\/08927790261480572","type":"journal-article","created":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T04:56:21Z","timestamp":1787806581000},"page":"1433-1439","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Evaluating the Resolution of Hydronephrosis Following Pyeloplasty for Ureteropelvic Junction Obstruction in the Adult Population"],"prefix":"10.1177","volume":"40","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4341-2489","authenticated-orcid":false,"given":"Ginnie","family":"Jeng","sequence":"first","affiliation":[{"name":"Department of Urology, Indiana University School of Medicine, Indianapolis, Indiana, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jason L.","family":"Zappia","sequence":"additional","affiliation":[{"name":"Department of Urology, Indiana University School of Medicine, Indianapolis, Indiana, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ethan L.","family":"Ferguson","sequence":"additional","affiliation":[{"name":"Department of Urology, Indiana University School of Medicine, Indianapolis, Indiana, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chandru P.","family":"Sundaram","sequence":"additional","affiliation":[{"name":"Department of Urology, Indiana University School of Medicine, Indianapolis, Indiana, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ronald S.","family":"Boris","sequence":"additional","affiliation":[{"name":"Department of Urology, Indiana University School of Medicine, Indianapolis, Indiana, USA."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,8,26]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1097\/00005392-199909010-00016"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1464-410x.2001.00108.x"},{"key":"e_1_3_2_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1464-410X.2009.08983.x"},{"key":"e_1_3_2_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/nrurol.2014.240"},{"key":"e_1_3_2_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2018.08.010"},{"key":"e_1_3_2_7_1","doi-asserted-by":"publisher","DOI":"10.5173\/ceju.2014.01.art24"},{"key":"e_1_3_2_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2010.05.017"},{"key":"e_1_3_2_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpurol.2020.10.031"},{"key":"e_1_3_2_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2012.08.036"},{"key":"e_1_3_2_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2009.09.092"},{"key":"e_1_3_2_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5347(17)43262-9"},{"key":"e_1_3_2_13_1","doi-asserted-by":"publisher","DOI":"10.1016\/0090-4295(83)90049-3"},{"key":"e_1_3_2_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00255872"},{"key":"e_1_3_2_15_1","doi-asserted-by":"publisher","DOI":"10.1111\/nyas.14529"},{"key":"e_1_3_2_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2013.12.052"},{"key":"e_1_3_2_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2023.01.013"},{"key":"e_1_3_2_18_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2007.10.070"},{"key":"e_1_3_2_19_1","doi-asserted-by":"publisher","DOI":"10.3389\/fped.2021.646517"},{"key":"e_1_3_2_20_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41585-025-01081-z"}],"container-title":["Journal of Endourology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/08927790261480572","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/full-xml\/10.1177\/08927790261480572","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.1177\/08927790261480572","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,11,7]],"date-time":"2026-11-07T23:25:12Z","timestamp":1794093912000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.1177\/08927790261480572"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,26]]},"references-count":19,"journal-issue":{"issue":"12","published-print":{"date-parts":[[2026,12,1]]}},"alternative-id":["10.1177\/08927790261480572"],"URL":"https:\/\/doi.org\/10.1177\/08927790261480572","relation":{},"ISSN":["0892-7790","1557-900X"],"issn-type":[{"value":"0892-7790","type":"print"},{"value":"1557-900X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,26]]}}}