Postnatal Assessment of the Infants with Antenally Detected Renal Pelvic Dilation

Abstract

Of the 280 patients, 70 (25 %) were female and 210 (75 %) were male. Mean follow up duration was 16.3±18.6 months (6-127 months). Of the 350 renal units with RPD in postnatal USG, 197 (56.3 %) were mild, 84 (24 %) were moderate and 69 (19.7 %) were severe . Among the infants with mild dilation non-obstructive pelvic dilation (n= 95: 70.4 %), vesicoureteral reflux (VUR) (n= 14: 10.4 %), ureteropelvic junction obstruction (UPJO) (n= 12: 8.9 %), ureterovesical junction obstruction (UVJO) (n= 3: 2.2 %), and posterior ureteral valve (PUV) (n=1: 0.7 %) were detected. In the moderate dilation group, non-obstructive pelvic dilation (n=29:44.7 %), VUR (n=15: 23%), UPJO (n=12: 18.5 %), UVJO (n=1:1.5 %), and PUV (n=3: 4.7 %) were encountered. In the severe dilation group, were non-obstructive pelvic dilation (n=10:13.2 %), VUR (n=5 :9.6 %), UPJO (n= 18: 34.6 %), UVJO (1:1.9 %), and PUV (n= 5: 9.6 %) were observed. RPD disappeared in 34.9 % of renal units with mild dilation on follow up and pd decreased in 26.4 %, was increased in 9% and remained stable in 29.7 % of the cases, respectively. The rate of spontaneous resolution of VUR was 34 %. Renal function deteriorated in 1 patient with PUV. Conclusion: Majority of mild or moderate antenatal RPD is due to non-obstructive pelvic dilation and VUR. Antenatal US is a sensitive method to detect urinary tract abnormalities with only 10 % false positive results.