Abstract
Objective. To determine when fetal urinary tract anomalies were detected by ultrasound screening during pregnancy and to discuss the possible consequences if only one early ultrasound examination is performed.Design. A retrospective study of 47 cases where fetal urinary tract malformations were diagnosed in a two-stage screening program (17th and 32nd week of gestation) covering 22,310 women over ten years, 1982-91.Setting. Ulleval University Hospital in Oslo which serves as a referral center for obstetric and neonatal diseases.Results. Urinary tract anomalies were diagnosed in 0.18% of the pregnancies. Of these, 61.7% were found at the second routine ultrasound screening. The most difficult differential diagnoses were those of hydronephrosis without megaureter and a multicystic kidney. Hydronephrosis was found in 51% and a multicystic kidney in 21% of the cases. The tentative prenatal diagnoses were confirmed postnatally in 83% of the cases.Six of the fetuses had anomalies regarded as incompatible with p...
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