ESPN 51th Annual Meeting

ESPN 2018


 
Comparison of SFU grading system and Urinary Tract Dilation classification system for predicting prognosis in antenatal hydronephrosis in first month postnatal ultrasonography
MERAL TORUN BAYRAM 1 ALPER SOYLU 1 SALIH KAVUKCU 1

1- DOKUZ EYLÜL UNIVERSITY MEDICAL FACULTY
 
Introduction:

We aimed to compare the predictive values of the Society for Fetal Urology (SFU) grading system and Urinary Tract Dilation (UTD) classification system in children with antenatal hydronephrosis (HN) with respect to detection of true obstructive pathology.

Material and methods:

Hospital files of 128 children with antenatal HN were evaluated retrospectively for postnatal first month USG, and dynamic renal scintigraphy and voiding cystourethrography (if performed) results. Each RUs were classified as SFU 0-I-II-III-IV and UTD Normal (N)-P1-P2-P3 according to SFU grading and UTD classification systems. In each RU, primary outcome was determined as normal, non-obstructive dilatation, obstructive uropathy or VUR. Comparative analyses between SFU grades/UTD groups and the primary outcome were performed using Fisher′s exact test.

Results:

The frequency of obstructive uropathy and VUR was not different between SFU 0-I vs UTD-N (20/137 vs 15/130), SFU-II vs UTD-P1 (10/52 vs 9/46), SFU-III vs UTD-P2 (9/26 vs 9/27), and SFU-IV vs UTD-P3 (22/31 vs 22/35). When the frequency of obstructive uropathy alone was evaluated, there was no difference between SFU 0-I vs UTD-N (8/125 vs 6/121), SFU-II vs UTD-P1 (1/41 vs 3/40), SFU-III vs UTD-P2 (5/22 vs 5/23) and SFU-IV vs UTD-P3 (14/24 vs 14/28).

Conclusions:

 Both grading systems equally allowed for proper risk-stratification and prediction of clinical outcomes based on the first postnatal month ultrasonography results.