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Annals of Surgical Oncology

, Volume 25, Issue 13, pp 3833–3842 | Cite as

Intraoperative Electron Radiation Therapy Combined with External Beam Radiation Therapy after Gross Total Resection in Extremity Soft Tissue Sarcoma: A European Pooled Analysis

  • Falk RoederEmail author
  • Antonino de Paoli
  • Ladan Saleh-Ebrahimi
  • Ingo Alldinger
  • Giulio Bertola
  • Giovanni Boz
  • Federico Navarria
  • Miguel Cuervo
  • Matthias Uhl
  • Ana Alvarez
  • Markus Buechler
  • Burkhard Lehner
  • Juergen Debus
  • Felipe A. Calvo
  • Robert Krempien
Sarcoma

Abstract

Introduction

We report a pooled analysis evaluating the combination of gross complete limb-sparing surgery, intraoperative electron radiation therapy (IOERT), and external beam radiation therapy (EBRT) in patients with extremity soft tissue sarcoma (STS).

Methods

Individual data of 259 patients (median follow-up 63 months) with extremity STS from three European expert centers were pooled. Median age was 55 years and median tumor size was 8 cm. Eighty percent of patients presented with primary disease, mainly located in the lower limb (81%). Union for International Cancer Control 7th edition stage at presentation was as follows: stage I: 9%; stage II: 47%; stage III: 39%; stage IV: 5%. Most patients showed high-grade lesions (91%), predominantly liposarcoma (31%). Median IOERT dose was 12 Gy, preceeded (17%) or followed (83%) by EBRT, with a median dose of 45 Gy.

Results

Surgery resulted in R0 resections in 71% of patients and R1 resections in 29% of patients. The 5-year local control (LC) rate was 86%, and significant factors in univariate analysis were disease status and resection margin. Only margin remained significant in multivariate analysis. The 5-year distant control rate was 69%, and significant factors in univariate analysis were histology, grading, resection margin, and metastases prior to/at IOERT. Only grading and metastases remained significant in multivariate analysis. Actuarial 5-year rates of freedom from treatment failure and OS were 61% and 78%, respectively. Significant factors for OS were grading and metastases prior to/at IOERT (univariate, multivariate). Limb preservation and good functional outcome were achieved in 95% and 81% of patients.

Conclusions

Our pooled analysis confirmed prior reports of encouraging LC and survival, with excellent rates of preserved limb function with this treatment approach. Resection margin remained the most important factor for LC, while grading and metastases prior to/at IOERT mainly predicted survival.

Notes

Acknowledgment

The authors thank Alexandra Diwo and Christiane Boos for their assistance in data handling and database management. No writing assistance was involved.

Conflict of interest

Falk Roeder, Antonino de Paoli, Ladan Saleh-Ebrahimi, Ingo Alldinger, Giulio Bertola, Giovanni Boz, Federico Navarria, Miguel Cuervo, Matthias Uhl, Ana Alvarez, Markus Buechler, Burkhard Lehner, Juergen Debus, Felipe A. Calvo, and Robert Krempien declare no conflicts of interest.

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Copyright information

© Society of Surgical Oncology 2018

Authors and Affiliations

  • Falk Roeder
    • 1
    • 2
    Email author
  • Antonino de Paoli
    • 3
  • Ladan Saleh-Ebrahimi
    • 4
  • Ingo Alldinger
    • 5
  • Giulio Bertola
    • 6
  • Giovanni Boz
    • 3
  • Federico Navarria
    • 3
  • Miguel Cuervo
    • 7
  • Matthias Uhl
    • 8
  • Ana Alvarez
    • 9
  • Markus Buechler
    • 10
  • Burkhard Lehner
    • 11
  • Juergen Debus
    • 8
    • 12
  • Felipe A. Calvo
    • 9
  • Robert Krempien
    • 13
  1. 1.Department of Radiation OncologyUniversity Hospital LMU MunichMunichGermany
  2. 2.CCU Molecular and Radiation OncologyGerman Cancer Research CenterHeidelbergGermany
  3. 3.Department of Radiation OncologyNational Cancer Institute, CROAvianoItaly
  4. 4.Strahlentherapie Freising und DachauDachauGermany
  5. 5.CPZ DüsseldorfDüsseldorfGermany
  6. 6.Department of Surgical OncologyNational Cancer Institute, CROAvianoItaly
  7. 7.Musculoskeletal Tumor Unit, University Hospital Gregorio MaranonComplutense UniversityMadridSpain
  8. 8.Department of Radiation OncologyUniversity of HeidelbergHeidelbergGermany
  9. 9.Department of Radiation Oncology, University Hospital Gregorio MaranonComplutense UniversityMadridSpain
  10. 10.Department of SurgeryUniversity of HeidelbergHeidelbergGermany
  11. 11.Department of Orthopedics and TraumatologyUniversity of HeidelbergHeidelbergGermany
  12. 12.CCU Radiation OncologyGerman Cancer Research CenterHeidelbergGermany
  13. 13.Department of RadiotherapyHelios Hospital Berlin-BuchBerlinGermany

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