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Accuracy of current imaging modalities in the diagnosis of synchronous bilateral Wilms' tumor. A report from the national wilms tumor study group

Background. Five percent of patients with Wilms' tumor will present with bilateral disease. Recent reports suggest that preoperative imaging studies can exclude contralateral disease reliably, obviating the need for formal surgical exploration of the contralateral kidney. This study was undertaken to determine the accuracy of preoperative imaging in diagnosing bilateral Wilms' tumor.