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Updated: Jun 28, 2026

Transmesenteric Laparoscopic Pyeloplasty in Trendelenburg Position for Horseshoe Kidney with Hydronephrosis
Published on: July 8, 2025
Laparoscopic dismembered pyeloplasty in 47 cases
Anuar Ibrahim Mitre1, Artur Henrique Brito, Miguel Srougi
1Division of Urology, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
Laparoscopic Anderson-Hynes pyeloplasty is a minimally invasive option for ureteropelvic junction obstruction, showing high success rates. This technique offers comparable outcomes to open surgery with reduced invasiveness.
Area of Science:
- Urology
- Minimally Invasive Surgery
- Pediatric Surgery
Background:
- Ureteropelvic junction (UPJ) obstruction is a common cause of pediatric and adult kidney issues.
- Surgical correction is often necessary to restore urine flow and prevent complications.
- Traditional open pyeloplasty has been the standard treatment.
Purpose of the Study:
- To evaluate the efficacy and outcomes of transperitoneal laparoscopic Anderson-Hynes pyeloplasty for UPJ obstruction.
- To assess the procedure's success rate regardless of the obstruction's cause.
- To compare laparoscopic outcomes with historical open surgery data.
Main Methods:
- A retrospective review of 47 patients undergoing laparoscopic Anderson-Hynes pyeloplasty.
- Patients aged 4-75 years with various etiologies of UPJ obstruction.
- Outcomes assessed via symptom evaluation and imaging studies during a mean 24-month follow-up.
Main Results:
- A 93.6% success rate was observed, with pain resolution and reduced ureteral dilation.
- Mean operative time was 157 minutes; no transfusions or open conversions were needed.
- Mean hospital stay was 2.2 days; crossing vessels were identified in 55% of cases.
Conclusions:
- Transperitoneal laparoscopic Anderson-Hynes pyeloplasty achieves success rates comparable to open procedures.
- The laparoscopic approach offers a less invasive alternative for UPJ obstruction treatment.
- This minimally invasive technique is a viable first-line option for UPJ obstruction.
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