Illustration of appendix-assisted ureteral reconstruction in a child.

Appendix to the Rescue: A Novel Approach to Complex Pediatric Ureteral Reconstruction

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Rhea Morgan in Health & Wellness October 2026 • 3 min read.

"When standard procedures fall short, surgeons are turning to innovative techniques like staged appendix-assisted ureteral repair to restore kidney function in young patients."


Ureteral loss and strictures pose significant challenges in pediatric urology. While ileal ureter replacement is common, using the appendix for reconstruction remains rare. Reconstructive procedures in critical situations are often avoided in favor of temporary solutions, but a new approach offers hope.

A recent case presents a staged ureteral reconstruction utilizing the appendix in a young patient. This innovative method provides a potential solution when standard techniques are not feasible.

This case highlights the successful use of the appendix to bridge a significant ureteral gap, offering a pathway to restore kidney function and improve the patient's quality of life.

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When Standard Options Are Limited

In critical situations, reconstructive procedures may be avoided in favor of temporary solutions, although a reported pediatric case describes staged ureteral reconstruction using the appendix when standard techniques were not feasible. The appendix has been infrequently reported as a ureteric substitute, and only a few reports describe its use in children; those pediatric cases mainly used it as a permanent solution. The case report suggests that the appendix may also offer a viable option in staged reconstruction. (Reference URLs 1 and 2)

A Procedure Dating to 1912

Appendiceal interposition uses the vermiform appendix as a replacement for part of the ureter, and the procedure was described as early as 1912 by Melnikoff. Later case studies reported its use in both pediatric and adult patients, though it remains rarely used. A review of right ureteral substitution also describes the appendix as an occasional replacement for sections of the right ureter and examines literature from the preceding 25 years.

A Complex Case: Rebuilding a Child's Urinary Tract

Illustration of appendix-assisted ureteral reconstruction in a child.

A 6-month-old girl was admitted to the PICU with sepsis. Her condition worsened, leading to multiple abdominal complications: cholecystostomy, ileostomy, and various fistulas. An ultrasound revealed hydronephrosis, and a MAG-3 scan confirmed a complete right ureteral obstruction. Attempts to place a stent failed, necessitating a nephrostomy.

Faced with a 6 cm ureteral gap, surgeons opted for a staged approach using the appendix. A cutaneous appendix-ureterostomy was performed to allow for initial drainage and hydronephrosis improvement.

  • Temporary Diversion: The appendix was connected to the proximal ureter and skin, creating a temporary urinary diversion.
  • Hydronephrosis Improvement: This diversion effectively drained the kidney, reducing hydronephrosis.
  • Staged Reconstruction: At 2 years old, the appendix was connected to the distal ureter, with a double-J stent placed to support healing.
  • Ileostomy Closure: The ileostomy was closed after the appendix anastomosis.
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Recent Pediatric Appendiceal Reconstruction Research

A multi-institutional report describes long-term outcomes of laparoscopic and robotic-assisted appendiceal onlay ureteroplasty (AOU) for complex proximal ureteral (CPU) strictures in children. A 2025 report also highlights postoperative follow-up after endourological surgery and explores appendiceal interposition for left ureteral reconstruction in a pediatric patient. A study listed as published June 23, 2026, compares the long-term effectiveness of appendiceal interposition ureteroplasty (AIU) and AOU for pediatric CPU strictures.

Limited Evidence and Potential Complications

Appendiceal ureteral reconstruction has not become widespread; the cited pediatric case report describes only a few case reports or small series. In critical upper-tract scenarios, temporary measures such as nephrostomies or ureterostomies may be favored over reconstruction. A separate pediatric report documents bilateral ureteral obstruction and acute renal failure in a 14-year-old boy nine days after appendectomy, illustrating a reported postoperative complication rather than a failure of appendiceal reconstruction.

Follow-up scans showed good patency and preserved renal function, with the child remaining asymptomatic at 4.5 years old. This case demonstrates the appendix's potential in complex ureteral reconstruction.

The Appendix Advantage: A Simple Solution for Complex Problems

While various techniques exist for ureteral reconstruction, the appendix offers unique advantages due to its location and ease of mobilization. This allows for tension-free anastomosis without compromising blood supply.

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Robotic Techniques in Pediatric Urology

Robotic surgery is described as particularly suited to pediatric procedures such as pyeloplasty and ureteral reimplantation, which require precise dissection and meticulous reconstruction. A 2026 review reports that robot-assisted pediatric urological surgery (RAPUS) has been increasingly adopted as minimally invasive techniques advance. Compared with open surgery and conventional laparoscopy, RAPUS can provide enhanced three-dimensional visualization and instrument dexterity and may facilitate better perioperative recovery.

A Retrospective Search for Pediatric Substitutes

A 2018 report describes a retrospective analysis of patients who underwent ureteric replacement at the authors’ hospital between 2003 and 2008. Its stated aim was to identify an appropriate ureteric substitute for pediatric patients. The supplied source excerpt does not provide the analysis results or identify which substitute was found appropriate.

The staged approach, as demonstrated in this case, minimizes the risk of complications by dividing the reconstruction into manageable steps. This is particularly beneficial in patients with prior complex abdominal issues.

Cutaneous appendix-ureterostomy provides a valuable temporary solution in critical conditions, facilitating definitive reconstruction once the patient is stabilized. It expands the options for managing challenging ureteral injuries.

What the follow-up shows-and does not show

The imaging findings trace several aspects of the result: drainage, passage through the reconstructed ureter, and measured kidney function. Together, they support a favorable course in this reported patient, but do not establish how often the approach succeeds in other children.[1]

The later scan adds evidence that preserved function was accompanied by mild, stable hydronephrosis; it does not mean every imaging finding had fully resolved.[1]

Where this case report is weakest

  • Appendix-based ureteral reconstruction remains uncommon in the literature described by the authors, with evidence largely limited to case reports and small series.[1]

How this case sits among appendiceal ureter repairs

The paper’s rationale for selecting the appendix is its location, which can allow mobilization and a tension-free connection while preserving blood supply; in this case, the proximal ureter itself could not reach the skin for a ureterostomy.[1] [2]

What remains uncertain about staged appendix repair

  • How consistently would the favorable drainage and function findings seen here occur in other children, given the small body of published experience?[1]
  • How often do the anastomotic risks identified by the authors arise in appendiceal ureteral reconstruction?[2]

Terms used in the follow-up

Retrograde pyelogram
An imaging study used here to assess the reconstructed ureter’s patency.[1]

Sources

  1. Staged ureteral reconstruction using the appendix in a complex pediatric patient (Europe PMC, 2018)
  2. Staged ureteral reconstruction using the appendix in a complex pediatric patient (doi.org, 2018)

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

This article is based on research published under:

DOI-LINK: 10.1016/j.eucr.2018.08.016, Alternate LINK

Title: Staged Ureteral Reconstruction Using The Appendix In A Complex Pediatric Patient

Subject: Urology

Journal: Urology Case Reports

Publisher: Elsevier BV

Authors: Paulo Renato Marcelo Moscardi, Ruben Blachman-Braun, Andrew Labbie, Miguel Castellan

Published: 2018-11-01

Everything You Need To Know

1

Why is the appendix used in this specific type of ureteral reconstruction?

Ureteral loss and strictures present major hurdles in pediatric urology. When the standard procedures are not an option, surgeons may turn to innovative methods. In this case, the appendix was used to bridge a significant ureteral gap. The goal is to restore kidney function and enhance the patient's well-being. This method offers a viable solution when other techniques are unfeasible.

2

How does the staged approach using the appendix work?

The innovative technique involves a staged approach utilizing the appendix. Initially, a cutaneous appendix-ureterostomy is performed, connecting the appendix to the proximal ureter and skin to create a temporary urinary diversion. This approach aids in draining the kidney and alleviating hydronephrosis. Subsequently, at a later stage, the appendix is connected to the distal ureter, often with a double-J stent to support healing. The ileostomy is closed following the appendix anastomosis.

3

What are the advantages of using the appendix in reconstructive procedures?

The appendix is utilized in this innovative approach because of its accessibility and ease of manipulation. The technique allows for a tension-free anastomosis, which is vital for successful reconstruction without disrupting blood supply. It's a practical solution for complex cases, offering a better outcome when conventional procedures are not suitable. This method is particularly useful for bridging significant ureteral gaps.

4

What was the outcome of the staged ureteral reconstruction in the case presented?

The staged ureteral reconstruction was successful in a young patient who had a complete right ureteral obstruction. The initial procedure included a cutaneous appendix-ureterostomy to create a temporary urinary diversion, aiding in drainage. After the appendix anastomosis, the ileostomy was closed. Follow-up scans indicated good patency and preserved renal function, and the child remained asymptomatic, showcasing the appendix's potential in complex ureteral reconstruction. This approach restored kidney function and improved the quality of life.

5

What is the significance of hydronephrosis in the context of this surgical procedure?

Hydronephrosis is a condition where the kidney swells due to a buildup of urine. In this instance, the patient's ultrasound revealed hydronephrosis. It indicates a blockage or obstruction in the urinary tract, preventing urine from flowing correctly. The primary objective of the appendix-assisted ureteral repair is to alleviate this hydronephrosis by re-establishing the normal urine flow, thereby preserving kidney function and improving the overall health of the child.

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