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Year : 2020  |  Volume : 11  |  Issue : 4  |  Page : 167-173

Management and outcome of extraosseous ewing's sarcoma family tumors treated at a tertiary care center in North East India: A retrospective analysis

1 Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, Guwahati, Assam, India
2 Department of Cancer Registry and Biostatistics, Dr. B. Borooah Cancer Institute, Guwahati, Assam, India
3 Department of Medical Oncology, Dr. B. Borooah Cancer Institute, Guwahati, Assam, India

Correspondence Address:
Dr. Faridha Jane R M Momin
Department of Radiation Oncology, Dr. B. Borooah Cancer Institute, Guwahati, Assam
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jrcr.jrcr_42_20

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Introduction: Extraosseous Ewing's Sarcoma is rare, aggressive malignant soft-tissue tumors treated similar to Ewing's sarcoma of bone. This study evaluates the clinicopathological pattern, treatment and outcomes of localized extraosseous Ewing's sarcoma family tumors (ESFTs) treated with an uniform treatment regimen. Materials and Methods: This is a retrospective single institution study where we evaluated the hospital records of localized extraosseous ESFT treated between January 2011 and December 2018. Fifteen patients were found eligible for analysis. Patient demographics, management details, and outcomes were analyzed statistically. Time to event was measured from the date of diagnosis and survival curves were estimated by Kaplan–Meier method with Log-rank test for comparison. Results: The median follow-up of the cohort was 17 months (range: 3–81 months). The mean age of patients was 14.4 years and the average tumor size was 9.92 cm. Two-thirds of the patients received definitive radiotherapy as the local treatment with 93.3% patients receiving induction chemotherapy. The 5-year local control rate, progression-free survival, and overall survival (OS) were 80%, 53.3%, and 46.7%, respectively. On univariate analysis, tumor size <8 cm and good response to chemotherapy were associated with significantly improved OS (P = 0.049 and 0.04, respectively), while local control rates were better for patients receiving radiotherapy dose 54 Gray and above (P = 0.044). Conclusion: The optimum management of extraosseous ESFT consists of multimodality therapy with multidrug chemotherapy, surgery, and radiotherapy. Localized tumors of <8 cm size with favorable response to induction chemotherapy have the best prognosis.

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