Resolution of primary non-refluxing megaureter: an observational study

Area of Science:

• Pediatric Urology
• Medical Management
• Ureteral Disorders

Background:

• Primary non-refluxing megaureter (PM) is a congenital condition affecting the ureter.
• Conservative management is often considered for PM, but its efficacy and timeline require further investigation.

Purpose of the Study:

• To evaluate the time taken for resolution (TTR) and identify complications associated with conservative management of primary non-refluxing megaureters (PM).

Main Methods:

• A prospective review of patients with PM managed conservatively from 2003 to 2011.
• Analysis of clinical features, ultrasound (USS), and MAG3 renography findings.
• Classification of patients based on lower ureteric diameter (UD): Group A (UD < 10 mm) and Group B (UD ≥ 10 mm).

Main Results:

• Seventy-six percent of Group A (UD < 10 mm) resolved spontaneously over a median of 60 months.
• Only 17% of Group B (UD ≥ 10 mm) resolved spontaneously over a median of 102 months.
• Complications, including ureteric calculi and decreasing renal function, were more frequent in Group B.

Conclusions:

• Conservative management of PM is highly successful in patients with ureteric diameter less than 10 mm.
• Higher ureteric diameters are associated with a greater risk of complications and longer resolution times.
• Time to resolution for PM can exceed five years, even with conservative approaches.