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S17-10 (P without presentation)
ACTIVE SURVEILLANCE FOR ANTENATALLY DETECTED
URETEROCELES- PREDICTORS OF SUCCESS
Veridiana ANDRIOLI
1
, Luis GUERRA
1
, Melise KEAYS
1
, Katrina SULLIVAN
1
,
Kenneth TANG
2
, Katie GARLAND
1
, Marat RAFIKOV
1
and Michael LEONARD
1
1) Children’s Hospital of Eastern Ontario, University of Ottawa, Surgery, Division of Urology, Ottawa, CANADA -
2) Children’s Hospital of Eastern Ontario, University of Ottawa, CHEO Research Institute, Ottawa, CANADA
PURPOSE
We sought factors predictive of success in selecting patients for active surveillance (AS) of antena-
tally detected ureteroceles.
MATERIAL AND METHODS
IRB approved retrospective review of infants with antenatally detected ureteroceles from 1990-2015.
All were detected antenatally except for 5 diagnosed when imaged for non-urological indications.
Post-natal US confirmed the diagnosis and VCUG documented VUR and/or bladder outlet obstruc-
tion (BOO). Patients with BOO were excluded. Patients onAS were placed on antibiotic prophylaxis.
Outcomes were assessed by descriptive statistics. Kaplan-Meier curves were utilized to estimate
median duration on AS in both single and duplex cohorts. Breakthrough febrile UTI(fUTI) and sur-
gery were surveillance failures and were determined by Cox regression in the duplex system cohort.
RESULTS
102 patients (64F/38M); 78 duplex system and 24 single system. Follow-up for single systems
ranged 100 days - 11.2 years and 20% failedAS. Duplex system follow-up ranged 7 days - 17.2 years
and 68% failed AS. Regression analysis of duplex systems showed male gender (HR=1.8 95% CI
[1.0, 3.3], p=0.037) or fUTI (HR 3.0 95% CI 1.7-5.4, p=0.001) was predictive of intervention. For
fUTI, ipsilateral lower moiety or contralateral hydroureter (OR) 9.5, 95% CI 1.2-71.7, p=0.028) was
predictive.
CONCLUSIONS
Single system ureteroceles are ideal for AS. AS for duplex systems can be successful in females
without hydroureter of non-ureterocele renal units. Males are at higher risk for failure. Long term
follow-up of AS patients is mandatory.
S17-11 (P without presentation)
ENDOSCOPIC BALLOON DILATION OF PRIMARY
OBSTRUCTIVE MEGAURETER. EXPERIENCE
AND OUTCOMES AFTER 100 CASES
Ruben ORTIZ, Alberto PARENTE, Laura BURGOS, Laura PEREZ
and Jose Maria ANGULO
Hospital Universitario Gregorio Marañon, Pediatric Urology Division, Department of Pediatric Surgery, Madrid, SPAIN
PURPOSE
To assess long-term effectiveness, complications and outcomes of primary obstructive megaureter
(POM) treated by endoscopic balloon dilation (EBD) in the largest series reported.