[Fatal urinary tract malformations: their place and incidence in a series of 450 neonatal autopsies].

In our serie of 450 neonatal necropsies, 26 cases presenting with urinary tract anomalies have been observed (5,7% of the total and 15,5% in those with malformations). From an etiological point of view, two groups could be distinguished: one (17 cases) with severe oligoamnios sequence and the second (9 cases) with hereditary malformations. In this second heterogeneous group thourough pathological examination seems to be the essential for diagnosis and efficient genetic counselling.