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16 February 2019 : Clinical Research  

Surgical Resection of Primary Ewing’s Sarcoma of Bone Improves Overall Survival in Patients Presenting with Metastasis

Yingqing Ren1ABDEF, Zhida Zhang1BCD, Liyong Shang1BC, Xinmao You1ACDF*

DOI: 10.12659/MSM.913338

Med Sci Monit 2019; 25:1254-1262

Abstract

BACKGROUND: Metastatic Ewing’s sarcoma (ES) of bone has a poor prognosis. Because there have been few previous studies on the prognostic factors and clinical outcome in patients with ES who have metastases at presentation, the aim of this study was to use the Surveillance, Epidemiology, and End Results (SEER) database to compare the clinical outcome following single and combined radiation treatment and surgery.

MATERIAL AND METHODS: The SEER database was used to identify patients with ES who presented with bone involvement and metastasis between 1973 to 2015. Prognostic analysis was performed using the Kaplan–Meier method and the Cox proportional hazards regression model.

RESULTS: There were 643 patients identified from the SEER database. The 5-year overall survival (OS) and cancer-specific survival (CSS) rates were 33.1% and 34.3%, respectively and the median OS and CSS were 29.0±1.9 and 29.0±2.1 months, respectively. Multivariate analysis identified age <20 years and surgical resection of the primary tumor to be significantly associated with improved OS. Radiation therapy was not an independent predictor of OS or CSS. Radiation therapy alone resulted in a significantly reduced the OS and CSS compared with surgical resection alone. Combined surgery and radiation therapy of the primary tumor did not significantly improve the OS or CSS of patients with ES and metastatic disease when compared with surgery alone.

CONCLUSIONS: Age <20 years and surgical resection of the primary tumor were significantly associated with improved OS in patients with primary ES of bone who presented with metastasis.

Keywords: Neoplasm Metastasis, Sarcoma, Ewing, Survival Analysis, Treatment Outcome, Aged, Bone Neoplasms, Combined Modality Therapy, Kaplan-Meier Estimate, Middle Aged, Prognosis, Proportional Hazards Models, SEER Program, Survival Rate

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750