{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T07:57:05Z","timestamp":1790582225310,"version":"4.1.0"},"reference-count":14,"publisher":"Wiley","issue":"9","license":[{"start":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T00:00:00Z","timestamp":1789344000000},"content-version":"vor","delay-in-days":13,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T00:00:00Z","timestamp":1788220800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J of Urology"],"published-print":{"date-parts":[[2026,9]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objectives<\/jats:title>\n This study aimed to evaluate how residual renal stone fragment size influences long\u2010term stone\u2010event\u2010free survival after ureteroscopic lithotripsy (URSL), highlighting its clinical importance.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n We retrospectively analyzed data from all patients who underwent URSL at our institution from 2008 to 2021. A total of 1334 cases were included and categorized into three groups based on their residual renal fragment size: 0\u2009mm (1030 cases), <\u20094\u2009mm (214 cases), and \u2265\u20094\u2009mm (90 cases). Patient characteristics, surgical outcomes, and postoperative stone events were examined. Stone event\u2010free survival rates were compared across these groups.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n During a mean follow\u2010up of 763\u2009days, 214 patients (16.0%) experienced stone events. The number of stone events in each group was 102 (9.9%) for 0\u2009mm, 57 (26.6%) for <\u20094\u2009mm, and 55 (61.1%) for \u2265\u20094\u2009mm. The 1\u2010year stone\u2010event\u2010free rates were 95.8%, 86.9%, and 44.9%, respectively, and the 5\u2010year rates were 81.8%, 51.6%, and 28.0%. The reintervention\u2010free rates at 1\u2009year were 97.4%, 91.7%, and 50.5%, respectively, and at 5\u2009years, they were 86.3%, 61.6%, and 35.5%. The log\u2010rank test indicated significant differences in both stone\u2010event\u2010free and reintervention\u2010free rates among the groups (\n p<\/jats:italic>\n \u2009<\u20090.001). The multivariate Cox regression analysis revealed that the size of residual stones (0\u2009mm versus <\u20094\u2009mm and \u2265\u20094\u2009mm) was the most significant factor in influencing stone events and re\u2010interventions.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The size of residual fragments after URSL significantly influences long\u2010term outcomes, emphasizing the importance of meticulous stone removal for optimal patient care.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/iju.70640","type":"journal-article","created":{"date-parts":[[2026,9,14]],"date-time":"2026-09-14T18:31:18Z","timestamp":1789410678000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Stone\u2010Event\u2010Free Survival After Ureteroscopic Lithotripsy According to Residual Fragment Size: Zero Residual Fragment Indicates a Good Prognosis"],"prefix":"10.1111","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-2330-6833","authenticated-orcid":false,"given":"Takashi","family":"Tamiya","sequence":"first","affiliation":[{"name":"Department of Urology, Kidney Stone Center Tokyo Metropolitan Ohtsuka Hospital Toshima\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1949-1754","authenticated-orcid":false,"given":"Ryoji","family":"Takazawa","sequence":"additional","affiliation":[{"name":"Department of Urology, Kidney Stone Center Tokyo Metropolitan Ohtsuka Hospital Toshima\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9319-1373","authenticated-orcid":false,"given":"Yuma","family":"Waseda","sequence":"additional","affiliation":[{"name":"Department of Urology, Kidney Stone Center Tokyo Metropolitan Ohtsuka Hospital Toshima\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2738-9792","authenticated-orcid":false,"given":"Masaki","family":"Kobayashi","sequence":"additional","affiliation":[{"name":"Department of Urology, Kidney Stone Center Tokyo Metropolitan Ohtsuka Hospital Toshima\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,14]]},"reference":[{"key":"e_1_2_12_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/iju.13552"},{"key":"e_1_2_12_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2015.11.009"},{"key":"e_1_2_12_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2018.09.053"},{"key":"e_1_2_12_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2021.02.025"},{"key":"e_1_2_12_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eururo.2005.01.005"},{"key":"e_1_2_12_7_1","unstructured":"A.Skolarikos A.Neisius A.Petrik et\u00a0al. \u201cGuidelines on Urolithiasis \u201d European Association of Urology (2022)."},{"key":"e_1_2_12_8_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00240\u2010023\u201001449\u2010z"},{"key":"e_1_2_12_9_1","doi-asserted-by":"publisher","DOI":"10.1089\/end.2020.0336"},{"key":"e_1_2_12_10_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.urology.2015.03.019"},{"key":"e_1_2_12_11_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.eclinm"},{"key":"e_1_2_12_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.euf.2024.05.010"},{"key":"e_1_2_12_13_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00345\u2010024\u201005325\u20102"},{"key":"e_1_2_12_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00345-023-04648-w"},{"key":"e_1_2_12_15_1","doi-asserted-by":"publisher","DOI":"10.1007\/s11255-024-04072-y"}],"container-title":["International Journal of 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