title: Prognostic factors for survival in patients with Ewing's sarcoma using the surveillance, epidemiology, and end results (SEER) program database.
abstract: BACKGROUND
  The current study aims to determine cause-specific survival in patients with Ewing's sarcoma while reporting clinical risk factors for survival.
  
  
  METHODS
  The Surveillance, Epidemiology, and End Results (SEER) Program database was used to identify patients with osseous Ewing's sarcoma from 1991 to 2010. Patient, tumor, and socioeconomic variables were analyzed to determine prognostic factors for survival.
  
  
  RESULTS
  There were 1163 patients with Ewing's sarcoma identified in the SEER Program database. The 10-year cause-specific survival for patients with non-metastatic disease at diagnosis was 66.8% and 28.1% for patients with metastatic disease. Black patients demonstrated reduced survival at 10 years with an increased frequency of metastatic disease at diagnosis as compared to patients of other race, while Hispanic patients more frequently presented with tumor size>10cm. Univariate analysis revealed that metastatic disease at presentation, tumor size>10cm, axial tumor location, patient age≥20 years, black race, and male sex were associated with decreased cause-specific survival at 10 years. Metastatic disease at presentation, axial tumor location, tumor size>10cm, and age≥20 years remained significant in the multivariate analysis.
  
  
  CONCLUSIONS
  Patients with Ewing's sarcoma have decreased cause-specific survival at 10 years when metastatic at presentation, axial tumor location, tumor size>10cm, and patient age≥20 years.
authors.affiliation: Department of Orthopaedics and Rehabilitation, University of Iowa, 200 Hawkins Drive, 01015 JPP, Iowa City, IA 52242, USA. Electronic address: kyle-duchman@uiowa.edu.
authors.forename: Kyle R
authors.initials: KR
authors.lastname: Duchman
authors.affiliation: Department of Orthopaedics and Rehabilitation, University of Iowa, 200 Hawkins Drive, 01015 JPP, Iowa City, IA 52242, USA. Electronic address: yubo-gao@uiowa.edu.
authors.forename: Yubo
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Department of Orthopaedics and Rehabilitation, University of Iowa, 200 Hawkins Drive, 01015 JPP, Iowa City, IA 52242, USA. Electronic address: kyle-duchman@uiowa.edu.
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Miller
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D011379:Prognosis; D012307:Risk Factors; D018426:SEER Program; D012512:Sarcoma, Ewing / Q000401:mortality* / Q000473:pathology; D016019:Survival Analysis; D055815:Young Adult
keywords: Bone neoplasms/mortality; Ewing/mortality; Risk factors; SEER program: survival rate; Sarcoma; Survival analysis