Improvements in multimodal therapy for osteosarcoma (OS) have increased event-free and overall survival. But have also led to a greater number of recurrences in uncommon sites. We report a young adult with OS who developed late bilateral renal relapse. Late recurrences to the kidneys have a more aggressive clinical behavior and poor prognosis documented by 15 cases of OS metastastic to the kidney in the literature. Two of those patients had a long survival after chemotherapy and surgery. This suggests that the disease can be controlled with early detection and treatment.
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