# A novel treatment strategy for bladder hypoplasia: A case of megaureter in a functional solitary kidney

## TL;DR

A baby with a rare kidney and bladder condition was successfully treated with a home-based bladder training method before surgery.

## Contribution

This is the first reported case of bladder hypoplasia treated with home bladder cycling.

## Key findings

- Home bladder cycling increased bladder capacity in a patient with bladder hypoplasia.
- Surgery was successfully performed after achieving age-appropriate bladder function.
- Long-term follow-up showed improved bladder compliance and capacity.

## Abstract

We report a case of megaureter in a functional solitary kidney in which surgery was performed after bladder capacity was increased by home bladder cycling.

A 6‐day‐old girl with a left megaureter, a right multicystic dysplastic kidney, and bladder hypoplasia underwent percutaneous left nephrostomy for obstructive renal failure. At 8 months, home bladder cycling was initiated to increase bladder capacity before the planned ureterocystoneostomy. Surgery was performed after bladder capacity increased. The left ureter was compressed by the left umbilical ligament, so ureteral end‐to‐end anastomosis was performed at 1 year and 4 months. At 2 years and 8 months, cystometry showed age‐appropriate bladder capacity and improved bladder compliance.

To the best of our knowledge, this is the first report of bladder hypoplasia treated by home bladder cycling.