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The response to initial chemotherapy as a prognostic factor in localized Ewing's sarcoma
European Journal of Cancer & Clinical Oncology
|April 1, 1985
Summary
Clinical response to initial chemotherapy strongly predicts outcomes in pediatric Ewing sarcoma patients. Early chemotherapy response is a key independent prognostic factor for disease-free survival, even when considering tumor site.
Area of Science:
- Pediatric Oncology
- Medical Research
- Clinical Trials
Background:
- Ewing sarcoma is a rare bone cancer primarily affecting children and young adults.
- Effective treatment strategies are crucial for improving survival rates and preventing metastasis.
Purpose of the Study:
- To evaluate the correlation between clinical response to initial chemotherapy and patient outcomes in localized Ewing sarcoma.
- To determine the prognostic significance of chemotherapy response and tumor site on survival.
Main Methods:
- Prospective cooperative study involving 95 children with localized Ewing sarcoma.
- All patients received initial chemotherapy followed by radiotherapy and/or surgery.
- Clinical response assessed in 67 patients based on measurable soft tissue mass or functional symptoms.
Main Results:
- A strong correlation was observed between chemotherapy response and disease-free survival (57.3% for good responders vs. 9% for bad responders, P < 0.00001).
- Tumor site (axial skeleton vs. limbs) significantly impacted survival but did not predict chemotherapy response.
- 23 of 26 poor responders achieved complete remission with radiotherapy.
Conclusions:
- Initial chemotherapy response is a highly significant independent prognostic factor for localized Ewing sarcoma.
- Tumor site is a prognostic factor for survival but does not predict response to chemotherapy.
- Multimodal therapy including chemotherapy, radiotherapy, and surgery is essential for managing Ewing sarcoma.