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Difficulties in "real-time" ultrasound diagnosis of fetal urological anomalies.

In the fetus of a diabetic woman, at the 24th week of pregnancy urological anomalies (cystic kidney malformations) were found with real-time ultrasound. At the 34th week these findings were confirmed and interpreted to be due to a lower urinary obstruction. Therefore a preterm Caesarean section was performed. In the newborn the left multicystic kidney was removed. The indications for the US screening in pregnancy and difficulties in the interpretation of urological findings of fetal and newborn ultrasonograms are discussed.