[Double kidney with ureterocele].

Twenty-six children with ureteroceles--twenty-three with unilateral double collecting system and three with bilateral double kidney--are analyzed. The clinical and radiological features of these ureteroceles are presented. The different possibilities of surgical management and their results are discussed. In 14 of these children we performed resection of the ureterocele with en bloc reimplantation of both ureters. Eleven cases were treated by resection of the ureterocele and upper pole nephroureterectomy and four cases by nephroureterectomy. Vesicoureteral reflux in both renal pelvic moieties was found in five cases after ureteral reimplantation en bloc. Because of frequent bilateral disease (10%) and the common association of other urological malformation it is preferable to try to perform ureteric reimplantation rather than primary nephroureterectomy even when the possibility of postoperative reflux is considered.