UNASSIGNED: Background - @entity3025 ( @entity3025 ) is a common pediatric @entity5450 . After the first @entity293 ( @entity293 ), imaging studies are recommended, starting with a renal ultrasound (US) and voiding cystourethrography (VCUG). We propose to determine whether abnormalities found on US can help indicate the necessity of VCUG in @entity1 after the first @entity293 . Methods - A retrospective study included all @entity1 admitted with their first episode of @entity293 from January 2007 to December 2012. Results - A total of 311 @entity1 were included. The median age was 2.5 years, 72.3% were female. @entity3025 Prevalence was 14%.   Forty-four @entity1 were found to have @entity3025 on VCUG, giving a prevalence of 14%. Of these 44 @entity1 , 11 had grade I reflux, 6 had grade II reflux, 3 had grade III reflux, 15had grade IV reflux, and 9 had grade V reflux. Ultrasound findings were positive for @entity3025 in 43 @entity1 , 19 of them had RVU. Twenty five @entity1 had a normal ultrasound but showed @entity3025 on VCUG (11 had grade I reflux, six grade II reflux, three grade III reflux and five grade IV reflux).   The sensitivity and specificity of ultrasound in suggesting @entity3025 were 43% and 91%, respectively. The positive predictive value of ultrasound in suggesting @entity3025 was 44%; the negative predictive value was 91%. Conclusion - Renal ultrasound findings are specific for @entity3025 in @entity1 with a first @entity293 , but no sensitive. Clinicians should consider renal ultrasound results to take decision on whether or not to proceed with a VCUG in the investigation of a first episode @entity293 in young @entity1 .

Contribution of ultrasound scans in the first episode of @entity293 in XXXX .

@entity3025 :: ('MESH:D014718', 'Disease') :: ['VUR', 'Vesicoureteral reflux'] @entity1 :: ('9606', 'Species') :: ['children', 'patients'] @entity5450 :: ('MESH:D014570', 'Disease') :: ['urologic disorder'] @entity293 :: ('MESH:D014552', 'Disease') :: ['urinary tract infection', 'UTI']
@entity1 :: (9606,Species) :: ['children']
