Renal masses in childhood rarely contain adipose tissue as a major component. We report a case of teratoid Wilms tumor, an atypical variant of nephroblastoma, in which bilateral renal masses were found on computerized tomography to have a high fat content. Previously reported cases have had clinical characteristics in common with our case. However, our patient died of metastatic disease, which to our knowledge has not been previously described.
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Williams et al. (1994) studied this question.
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