Primary obstructive megaureter: the role of high pressure balloon dilation

Area of Science:

• Pediatric Urology
• Minimally Invasive Surgery
• Endourology

Background:

• Primary obstructive megaureter (POM) is a congenital condition affecting the urinary tract in children.
• Minimally invasive treatments are increasingly preferred, but long-term data for endoscopic approaches are limited.
• Assessing the efficacy of endourologic interventions requires robust follow-up studies.

Purpose of the Study:

• To evaluate the long-term efficacy of endourologic high-pressure balloon dilation of the vesicoureteral junction (VUJ) in pediatric patients with POM.
• To establish the durability of results following successful endoscopic treatment for POM.
• To provide evidence supporting the indication for endoscopic management in select cases of POM.

Main Methods:

• Retrospective review of pediatric patients with POM treated with high-pressure balloon dilation of the VUJ between 2003 and 2010.
• A cohort study was conducted in 2011 to assess long-term outcomes.
• Endourologic dilation used a 2.7 FG balloon (minimum 3 mm), followed by Double-J stent placement.

Main Results:

• 29 children (32 renal units) with POM underwent endourologic dilation; 3 required open surgery.
• Successful dilation in 26 children (29 renal units) showed progressive improvement in 69% within 18 months.
• Long-term follow-up (median 47 months) confirmed sustained resolution of ureterohydronephrosis and improved drainage in patients with good initial outcomes.

Conclusions:

• High-pressure balloon dilation of the VUJ is a safe and effective minimally invasive treatment for pediatric POM.
• Satisfactory outcomes at 18 months post-dilation predict durable long-term success.
• Endourologic management offers a viable alternative to open surgery for selected children with POM.