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Metastasis of one tumor to another tumor within the same individual is considered rare. Lung cancer metastatic to renal cell carcinoma represents the most common combination of such tumor-to-tumor metastases. We present the autopsy case of a 97-year-old woman with metastatic adenocarcinoma of the lung to renal cell carcinoma.
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Sawada et al. (2009) studied this question.
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