[Polar resection in double kidneys in childhood].

78 cases of double kidneys without vesico-uretero-renal reflux, in which a heminephrectomy was done, were histologically investigated. The histopathological results were compared with the clinic and the urogram. It could be demonstrated that the results did not correspond in some cases. As a consequence of these discrepancies, we conclude that intravenous urography is not sufficient to indicate a primary heminephrectomy. Therefore, additional studies, such as a diethylenetriaminopentaacetate-T-99m scintigram and a preoperative kidney biopsy under sonographic control, are suggested.