Crossed renal ectopia: clinical and radiological findings in 22 cases.

The clinical and radiological features of 22 patients with crossed ectopic kidneys are reported, including a case with unusual mobility of an unfused ectopic kidney. In some cases the anomaly was an incidental finding. However, complications were frequent and included seven hydronephrotic and three non-functioning kidneys, two of the latter were found to be obstructed by a calculus. Vesico-ureteral reflux was demonstrated in three of the five children in whom the examination was performed. Anomalous blood supply was present in all patients who underwent renal arteriography or surgery. Skeletal anomalies were present in 11 patients, one of whom had in addition coarctation of the aorta, and another atrial septal defect and anal atresia.