Radiation Oncology Journal

  • 제35권3호
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  • Pages.198-207
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  • 2017
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  • 2234-1900(pISSN)
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  • 2234-3156(eISSN)
대한방사선종양학회 (The Korean Society for Radiation Oncology)
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Preoperative chemoradiotherapy versus postoperative chemoradiotherapy for stage II-III resectable rectal cancer: a meta-analysis of randomized controlled trials

  • Song, Jin Ho (Department of Radiation Oncology, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine) ;
  • Jeong, Jae Uk (Department of Radiation Oncology, Chonnam National University Hospital, Chonnam National University School of Medicine) ;
  • Lee, Jong Hoon (Department of Radiation Oncology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Kim, Sung Hwan (Department of Radiation Oncology, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Cho, Hyeon Min (Department of Surgery, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Um, Jun Won (Department of Surgery, Korea University Ansan Hospital) ;
  • Jang, Hong Seok (Department of Radiation Oncology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea) ;
  • Korean Clinical Practice Guideline for Colon and Rectal Cancer Committee (Korean Clinical Practice Guideline for Colon and Rectal Cancer Committee)
  • 투고 : 2017.02.01
  • 심사 : 2017.03.31
  • 발행 : 2017.09.30
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초록

Purpose: Whether preoperative chemoradiotherapy (CRT) is better than postoperative CRT in oncologic outcome and toxicity is contentious in prospective randomized clinical trials. We systematically analyze and compare the treatment result, toxicity, and sphincter preservation rate between preoperative CRT and postoperative CRT in stage II-III rectal cancer. Materials and Methods: We searched Medline, Embase, and Cochrane Library from 1990 to 2014 for relevant trials. Only phase III randomized studies performing CRT and curative surgery were selected and the data were extracted. Meta-analysis was used to pool oncologic outcome and toxicity data across studies. Results: Three randomized phase III trials were finally identified. The meta-analysis results showed significantly lower 5-year locoregional recurrence rate in the preoperative-CRT group than in the postoperative-CRT group (hazard ratio, 0.59; 95% confidence interval, 0.41-0.84; p = 0.004). The 5-year distant recurrence rate (p = 0.55), relapse-free survival (p = 0.14), and overall survival (p = 0.22) showed no significant difference between two groups. Acute toxicity was significantly lower in the preoperative-CRT group than in the postoperative-CRT group (p < 0.001). However, there was no significant difference between two groups in perioperative and chronic complications (p = 0.53). The sphincter-saving rate was not significantly different between two groups (p = 0.24). The conversion rate from abdominoperineal resection to low anterior resection in low rectal cancer was significantly higher in the preoperative-CRT group than in the postoperative-CRT group (p < 0.001). Conclusions: As compared to postoperative CRT, preoperative CRT improves only locoregional control, not distant control and survival, with similar chronic toxicity and sphincter preservation rate in rectal cancer patients.

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참고문헌

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