{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,4]],"date-time":"2026-05-04T03:57:48Z","timestamp":1777867068138,"version":"3.51.4"},"reference-count":36,"publisher":"SAGE Publications","issue":"6","license":[{"start":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T00:00:00Z","timestamp":1770854400000},"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":[[2026,6,1]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>To evaluate the effects of renal parenchymal thickness (RPT) and tract length (TL) on the stone-free rate (SFR) and complications in pediatric patients who underwent minimally invasive percutaneous nephrolithotomy (mini-PCNL).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>The data of pediatric age group (&lt;18 years) patients who underwent mini-PCNL between 2017 and 2025 in our clinic, which is a tertiary referral center, were retrieved. Eighty patients were included in this study. SFR was determined using low-dose nonenhanced CT in all patients 1 month after procedure. Stone-free status was defined as the complete absence of stones, and the presence of any stone fragment, regardless of size, was defined as residual stone.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      The mean stone diameter was 22.8 mm, and the mean stone burden was 402 mm\n                      <jats:sup>2<\/jats:sup>\n                      . Although 46.3% of the stones were located only in the renal pelvis, 32.5% were staghorn. Mean RPT was 13.6\u2009\u00b1\u20095.0 mm, TL was 33.0\u2009\u00b1\u200910.5 mm, and RPT\/TL ratio was 0.42\u2009\u00b1\u20090.13. Complications occurred in 27.5% of the patients. No major (grade 4\u20135) complications were observed in any patient. After mini-PCNL, stone-free status was achieved in 65% of patients. The mean diameter of residual stone was 3.4\u2009\u00b1\u20095.9 mm. When comparing patients who were stone free and those with residual stones, RPT (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.059), TL (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.315), and RPT\/TL ratio (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.563) were similar between groups. When patients with and without complications were compared, no statistically significant difference was found between the two groups in RPT (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.084), TL (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.589), and RPT\/TL ratio (\n                      <jats:italic toggle=\"yes\">p<\/jats:italic>\n                      = 0.723).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Mini-PCNL appears to be an effective and safe surgical technique that can be applied in pediatric patients with kidney stones, regardless of RPT and TL; however, prospective multicenter studies are necessary to confirm our results in a larger number of patients.<\/jats:p>\n                  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