Management of primary obstructive megaureter without reflux in neonates

Area of Science:

• Pediatric Urology
• Neonatal Medicine
• Diagnostic Imaging

Background:

• Antenatal ultrasonography has increased the diagnosis of neonatal megaureter.
• Many cases are asymptomatic, and spontaneous resolution is reported.
• Primary megaureter management remains debated, particularly regarding surgical intervention versus conservative approaches.

Purpose of the Study:

• To evaluate the outcomes of initial surgical intervention versus conservative management for neonatal primary megaureter.
• To determine the effectiveness of surgical repair in relieving obstruction and preserving renal function.
• To assess the role of intravenous pyelography (IVP) in guiding surgical decisions.

Main Methods:

• Retrospective analysis of 59 renal units in 48 neonates diagnosed with primary megaureter.
• Initial surgical intervention in 35 cases based on IVP findings (delayed contrast appearance, massive dilatation, delayed drainage).
• Conservative management in 24 cases, with secondary surgery for 11 ureters due to lack of improvement or worsening.

Main Results:

• Excellent outcomes reported for reimplantation surgery (early or delayed).
• Obstruction relief without reflux achieved in 92% (36/39) of long-term follow-up cases.
• Conservative management led to complete regression in 7 cases and partial regression in 6 cases; 11 required secondary surgery.

Conclusions:

• Initial surgical intervention for primary megaureter, guided by IVP, is effective in relieving obstruction with excellent outcomes.
• Conservative management can be successful in some cases, but careful monitoring is essential.
• The study supports an active surgical approach for significant obstructive megaureter based on specific IVP criteria.