Prenatal ultrasonography provides accurate detection and classification of urinary tract anomalies which make up the majority of prenatal anomalies. Reviewed 39 infants. With urinary tract anomalies diagnosed by prenatal ulfrasonography in the
period
1990 to 1994, and correlative analysis was done between pre and post ultrasonography. Fifteen thousand three hundred and fifty cases of prenatal ultrasonography were performed and among them, 39 cases (0.25%) were diagnosed with urinary tract
anomalies
The gestational ages on detection were between 21 to 40 weeks (mean 32 weeks). Mostly, prenatal ultrasonography were performed between 31 and 35 weeks. The sex ratio was 4.5:1 (M:F) On prenatal ultrasonographic findings, 29 cases (74%) had pelvic
dilatation, 9 cases (23%) had cystic diseases and 1 case (3%) had renal mass. Postnatal follow up studies revealed 18 cases (46%) with ureteropevie junction obstruction, 9 cases (23%) with multicystic dysplastic kidney and 7 cases (18%) had
normal
kidney. Among the 29 cases with pelvic dilatation on prenatal ultrasonography, 22 cases had AP diameter greater than 10mn. Postnatal ultrasonography was abnormal for these pelvic dilatation of AP diameter greater than 10mm. Other associated
anomalies
included Turner syndrome, Dandy-Walker syndrome, cryptorchidism and congenital heart diseases. According to these findings, as non-invasive procedure, prenatal ultrasonography is very available for screening of fetal urinary tract anomalies. It
is
necessary to follow-up persistently after birth when pelvic dilatation of AP diameter greater than 10mm is present prenatally. Therefore, early diagnosis of urinary tract anomalies by prenatal ultrasonography may be able to prevent progression
of
renal
damage and provides immediate management of these infants after delivery.
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