Table 1 Patient clinical characteristics

Age (years)

 Infant

1.99 ± 0.72

 Children

8.9 ± 2.9

Sex

 Male

18 (69.2%)

 Female

8 (30.8%)

Side

 Left

13 (50%)

 Right

13 (50%)

Stenosis

 Isolated

23 (88.5%)

 Multiple

3 (11.5%)

Symptoms

 Prenatal hydronephrosis

13 (50%)

 Abdominal/flank pain

11 (42.3%)

 Abdominal mass

2 (7.7%)

Prior surgery

 Nephropyeloplasty

3 (11.5%)

 Bilateral ureter reimplantation

1 (3.8%)

 Nephrostomy

1 (3.8%)

Associated anomalies

 Contralateral multicystic dysplastic kidney

3 (11.5%)

 Isolated kidney

2 (7.7%)

 Dysrotation of renal axis

2 (7.7%)

 Ipsilateral UPJO

2 (7.7%)