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Retrocaval ureter is a relatively rare anomaly that usually manifests in the third or fourth decades. Symptoms are due to ureteric obstruction, either extrinsic by the abnormal inferior vena cava (IVC), or intrinsic ureteric hypoplasia. Surgery is needed for symptomatic cases and involves transection and relocation of the ureter anterior to the IVC. We report our experience with two such children who needed surgery because of increasing hydronephrosis and who have done well since.