Transvesicoscopic Politano–Leadbetter Versus Laparoscopic Lich–Gregoir Ureteral Reimplantation for Primary Obstructive Megaureter in Infants and Toddlers: A Retrospective Comparative Cohort Study

<jats:p>Objective: Our objective was to compare clinical safety and postoperative efficacy between transvesicoscopic Politano–Leadbetter (TPL) and laparoscopic Lich–Gregoir (LLG) ureteral reimplantation in infants and toddlers under 36 months diagnosed with primary obstructive megaureter (POM). Methods: This was a single-center retrospective cohort study of pediatric patients with POM who underwent ureteral reimplantation between January 2018 and April 2025. Patients were stratified into TPL and LLG groups by surgical approach. Baseline characteristics, perioperative outcomes, perioperative complications, imaging findings, renal functional outcomes, and long-term complications were collected and analyzed. Primary group comparisons were unadjusted, with additional multivariable linear regression performed for operative duration. Results: We enrolled 65 children: 30 in the TPL group and 35 in the LLG group. Baseline characteristics showed no statistically significant differences across the two study cohorts. There were no open conversions in either group. Total operative duration did not differ significantly between the TPL and LLG groups (145.8 ± 30.6 min vs. 136.9 ± 25.2 min; mean difference, 8.9 min; 95% CI, −4.9 to 22.7; p = 0.210). In multivariable linear regression, TPL showed a non-significant trend toward longer operative time after adjustment for age, preoperative ureteral diameter, and surgery year (B = 10.4 min; 95% CI, −3.7 to 24.4; p = 0.141). Time to postoperative oral intake was slightly shorter in the TPL group (6.1 ± 2.3 h vs. 8.2 ± 2.9 h; mean difference, −2.1 h; 95% CI, −3.4 to −0.8; p = 0.002). No statistically significant differences were detected in estimated blood loss, ureteral tapering rate, double-J stent placement rate, postoperative pain score, acetaminophen use, urinary catheterization duration, or length of hospital stay. Perioperative complications occurred in 3 patients in the TPL group and 5 patients in the LLG group (10.0% vs. 14.3%; risk difference, −4.3%; 95% CI, −20.1% to 11.5%; p = 0.716). No Clavien–Dindo grade III or higher complications occurred in either group. During follow-up, both groups showed reductions in anteroposterior pelvic diameter (APD) and ureteral diameter (UD), with preserved differential renal function (DRF). Low-grade postoperative vesicoureteral reflux (VUR) was detected in two LLG patients, including one grade I case at 4 months and one grade II case at 6 months after surgery; both were managed conservatively. Neither group experienced recurrent ureterovesical junction obstruction (UVJO) nor required reoperation during follow-up. Conclusions: In this single-center retrospective cohort of infants and toddlers with POM, no statistically significant differences were detected in the main perioperative and follow-up outcomes between TPL and LLG. TPL enables intravesical reconstruction and better preserves the natural anatomical course of the ureter and may serve as an alternative minimally invasive option for this patient population.</jats:p>