Kidney-sparing procedures remain the operative approach of choice in patients with bilateral WT, but bear the risk of chronic renal failure when one kidney has to be removed. PN in children with unilateral WT, carried out by an experienced surgeon, is a reasonable alternative to nephrectomy if strict guidelines such as excellent tumor response to preoperative chemotherapy and easy resectability far away from the tumor margins through healthy kidney tissue are followed. Paraaortic lymph nodes must be free of tumor invasion in order to avoid local radiotherapy. PN prevents the patient from having to have dialysis in cases of contralateral nephrectomy resulting from metachronous WT or subsequent renal trauma.
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