Intraoperative Radiation Therapy for Unresectable Pancreatic Cancer

절제 불가능한 췌장암에서 수술중 방사선치료의 적용

  • Lee, Nam-Kwon (Department of Radiation Oncology, Korea University College of Medicine) ;
  • Kim, Chul-Yong (Department of Radiation Oncology, Korea University College of Medicine) ;
  • Park, Young-Je (Department of Radiation Oncology, Korea University College of Medicine) ;
  • Lee, Suk (Department of Radiation Oncology, Korea University College of Medicine)
  • 이남권 (고려대학교 의과대학 방사선종양학교실) ;
  • 김철용 (고려대학교 의과대학 방사선종양학교실) ;
  • 박영제 (고려대학교 의과대학 방사선종양학교실) ;
  • 이석 (고려대학교 의과대학 방사선종양학교실)
  • Published : 2010.12.31

Abstract

Purpose: We wanted to evaluate the clinical effectiveness of intraoperative radiation therapy (IORT) in combination with external beam radiation therapy (EBRT) for treating unresectable or metastatic pancreatic cancer. Methods: From August 1993 to July 2007, 28 patients with unresectable or metastatic pancreatic cancer received IORT (median: 20 Gy) combined with or without EBRT (median: 50.4 Gy). Eighteen patients were treated with IORT followed by EBRT, and 10 patients were treated by IORT alone. Eighteen patients underwent explolaparotomy and 10 patients underwent bypass surgery. Results: The 1-year overall survival rate (OS) and the median survival time of all 28 patients were 21.4% and 7.5 months, respectively. The 1-year OS and median survival time for the clinical stage III patients were 33.3% and 10.2 months, respectively, and they were 7.7% and 5.1 months for the clinical stage IV patients, respectively (p=0.007). Univariate analyses revealed that the stage, chemotherapy and tumor volume were the significant prognostic factors for OS. The patients treated with IORT combined with EBRT had a more favorable 1-year local control rate than that of those patients treated with IORT alone (88.9% vs. 50.0, respectively, p=0.009). But the significant improvement in local control did not translate into a survival benefit. The addition of EBRT was an independent prognostic factor for improving the local control rate. The operative mortality was 0%. Conclusion: IORT combined with EBRT is considered to be effective in achieving local control and palliation for patients with unresectable or metastatic pancreatic cancer. Further, IORT seems to be safe and it does not increase the mortality or the incidence of surgical wound infection.

Keywords

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