Abstract
Metastatic and recurrent pediatric solid tumors usually respond to chemotherapy but are likely to recur. Because of steep dose-response relationships, HDT requiring hematopoietic rescue may improve outcome. This strategy has recently been shown to be effective for metastatic neuroblastoma. Metastatic Ewing's sarcoma appears to be a closely analogous situation, and promising phase II studies suggest that a definitive trial of efficacy would be appropriate. Phase I or II trials remain appropriate and are needed to define further the efficacy of HDT for most other poor prognosis pediatric solid tumors.
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