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[Association of infantile nephroblastomatosis and Wilms' tumor: discussion of a clinical case and therapeutic problems, analysis of the literature].

This is a case report of bilateral nephroblastomatosis in a 19 month child, who underwent a unilateral nephrectomy and chemotherapy. Further review of the nephrectomy specimen and biopsies of the contralateral kidney revealed mature features of nephrogenic rests progressing to Wilms' tumor. We have reviewed the literature and discuss the presentation and different therapeutic approaches.