P08.04: Ultrasonographic prenatal diagnosis and prenatal management of malformation of the fetal urinary tract

Congenital abnormalities of urinary tract correspond to approximately 6.4–8.3% of the structural anomalies detected during the prenatal period. They are essentially diagnosed by ultrasound, which permits the study of the major fetal urinary system structures starting from the 16th week of pregnancy. From July 2009 to January 2011 a total of 564 cases of pregnancies with risk factors or ultrasonographic suspicion of fetal malformation were referred to our service for morphological ultrasound. We used a systematic approach to the prenatal diagnosis of urinary tract abnormalities, including assessment with AFV, localization and characterization of kidneys, bladder, collecting system, fetal gender and associate anomalies. All patients were evaluated by two or three examiners with experience in prenatal diagnosis accompanied by geneticist in the examination room. A high resolution instrument model DC-7 (Mindray) was used. A diagnosis of urogenitary system malformations was made in 49 of the 564 fetuses evaluated, corresponding to 8.6% of the total The incidence of urogenitary tract malformation in the present series was about 1.5 times higher than the reported in the literature. Most malformations can be surgically corrected after birth, with a good prognosis in the absence of complex syndromes or associated chromosomal disease.

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