ESPU Congress 2018 - Abstract Book

124 29 th CONGRESS OF THE ESPU 10:19–10:22 S15-2 (PP) ENDOSCOPIC BALLOON DILATATION IN PRIMARY OBSTRUCTIVE MEGAURETER IN INFANTS: LONG-TERM RESULTS Isabel CASAL BELOY, Miriam GARCÍA GONZÁLEZ, Ivan SOMOZAARGIBAY and Teresa DARGALLO CARBONELL Children's Hospital "Teresa Herrera-Materno Infantil", A Coruña, Pediatric Surgery. Urology Division., A Coruña, SPAIN INTRODUCTION The endoscopic balloon dilation is a new minimal invasive alternative for the treatment of Primary Obstructive Megaureter in infants. This is an effective procedure in short-term follow-up but few studies have shown its long-term efficacy. The aim of this study is to evaluate the long-term results of ballon dilation. MATERIAL AND METHODS We performed a retrospective review of patients treated with balloon dilation. The indications for surgery were: worsening of the hydronephrosis, renal function impairment and recurrent urinary tract infections. All patients were followed 6 months after endoscopic procedure with ultrasonogra- phy, MAG-3 renogram and voiding cystouretrography. Annual ultrasound was performed until now. RESULTS We treated 13 patients, (median age 9 months, range 2 to 24). 10 patients had prenatal diagnoses of hydronephrosis and in 3 the diagnoses was made after a urinary tract infection. No intraop- erative complications were observed. 1 double-J stent was replaced after endoscopic procedure for malpositioning. 4 patients developed an urinary tract infection after surgery. All patients had non-obstructive MAG-3 diuretic renogram 6 months after surgery. The mean washout on the reno- gram and the ultrasound pelvic diameter showed pre and postoperative statistical differences. All patients maintained their results without recurrence in the long-term. The median of follow-up was 10.3 years, (Range: 4.7 to 12.2). Outcomes Preoperative 6 months after surgery P-value(Wilcoxon test) Median distal ureter diameter (mm) 15 (range: 7-22) 4 (range: 3-9) P < 0.001 Median pelvis diameter (mm) 20 (range: 13-25) 11 (range: 3-15) P < 0.001 Median DRF (%) MAG-3 renogram 49.7 (range: 29-58) 51 (range: 43-56) P = 0.249 T ½ (minutes) MAG-3 renogram 73 (range: 25-150) 5.5 (range: 5-20) P < 0.001 CONCLUSIONS Balloon dilation can be an effective procedure for the treatment of Primary Obstructive Megaureter in long-term follow-up. More studies are needed to demonstrate these results.