[Renal dysplasia and vesico-ureteral reflux]

We studied two groups of patients in order to evaluate the frequency of association between renal dysplasia and vesicoureteral reflux. The first was composed of 19 patients with dysplastic kidneys, 15 of whom were studied by means of micturition cystourethrography. The second group was made up of 86 patients with 124 kidneys with reflux. In 16 of these we were able to obtain a histopathological diagnosis of the renal lesions (12 nephrectomies, 4 biopsies). In three cases the renal dysplasia was associated with a vesicoureteral reflux, which represents an incidence of reflux in 20% of the patients with renal dysplasia, and an incidence of dysplasia in 19% of the kidneys with reflux examined histopathologically. We contrast these results with the literature, discussing the pathogenic hypotheses that enable us to explain this association as well as the clinical consequences thereof.