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Protective, elective lung irradiation in non-metastatic Ewing's sarcoma
L Marinova1, I Hristozova2, I Mihaylova3
1Department of Radiology and Radiotherapy, Medical University, Varna, Bulgaria.
Radiation Protection Dosimetry
|June 27, 2015
Summary
Elective lung irradiation in children with non-metastatic Ewing's sarcoma significantly reduced lung metastases and improved survival. This approach warrants further investigation for specific patient risk groups.
Area of Science:
- Pediatric Oncology
- Medical Imaging and Radiation Therapy
Background:
- Ewing's sarcoma is a rare pediatric bone cancer.
- Peripheral primitive neuroectodermal tumors (PNETs) are a group of rare tumors.
Purpose of the Study:
- To evaluate the efficacy of elective whole lung irradiation in reducing lung metastases in pediatric patients with non-metastatic Ewing's sarcoma.
Main Methods:
- Retrospective analysis of 34 children treated for Ewing's sarcoma between 1984-2000.
- Complex treatment included VACA chemotherapy, local radiotherapy (50-56 Gy), and surgery.
- Elective whole lung irradiation (12-15 Gy) was administered to 11 patients achieving local tumor control.
Main Results:
- Elective lung irradiation in 11 non-metastatic Ewing's sarcoma patients showed a significant reduction in lung metastases.
- Improved disease-free survival and overall survival were observed in this subgroup.
- Treatment approach led to good outcomes, necessitating further risk group definition.
Conclusions:
- Elective whole lung irradiation combined with standard therapy is a promising approach for non-metastatic Ewing's sarcoma.
- Identifying specific risk groups can optimize the application of this treatment strategy.
- Further research is needed to define patient selection criteria for elective lung radiotherapy.
