Outcomes with nondose-dense chemotherapy for Ewing sarcoma: A practical approach for the developing world

Area of Science:

• Pediatric Oncology
• Medical Oncology
• Cancer Treatment

Background:

• Multidisciplinary care improves Ewing sarcoma cure rates.
• Dose-dense chemotherapy is challenging in resource-limited settings.
• This study evaluates a nondose-dense chemotherapy protocol (EFT-2001).

Purpose of the Study:

• To assess outcomes of a nondose-dense chemotherapy protocol for Ewing sarcoma.
• To identify prognostic factors affecting survival.
• To evaluate feasibility in resource-limited settings.

Main Methods:

• Retrospective analysis of patients (<15 years) treated with EFT-2001 protocol.
• Curative intent treatment from January 2013 to June 2017.
• Local therapy planned after 9-12 weeks of chemotherapy; radiotherapy for metastatic sites.

Main Results:

• 3-year event-free survival (EFS) and overall survival (OS) were 65.3% and 79.3% respectively.
• For localized disease, 3-year EFS was 70.9% and OS was 82.8%.
• Residual disease post-radiotherapy and delayed local control (>4 months) significantly worsened outcomes.

Conclusions:

• Nondose-dense chemotherapy yields good outcomes with manageable toxicity.
• This approach is feasible and beneficial in resource-limited settings.
• Effective local control and absence of residual disease are critical for favorable prognosis.