Rectal Cancer pp 223-234 | Cite as
Radiation Therapy: Adjuvant vs. Neoadjuvant Therapy
Abstract
Historically, combined chemoradiotherapy has been shown to improve local control and overall survival rates compared to surgery alone in the adjuvant setting. The primary advantage of an adjuvant approach is improved patient selection based on operative and pathologic staging. Comparatively, a neoadjuvant approach decreases rates of acute and chronic toxicity, facilitates tumor downing staging in patients who might otherwise require abdominoperineal resection, and improves local control rates. This has been confirmed by recent randomized studies which demonstrated improved disease- and treatment-related outcomes using a neoadjuvant vs. adjuvant approach. Presently, ongoing studies are evaluating the integration of novel systemic agents in combination with radiation therapy in the neoadjuvant setting.
Keywords
Rectal Cancer Sphincter Preservation Local Failure Rate Rectal Cancer Treatment Local Relapse RateReferences
- 1.Gastrointestinal Tumor Study Group. Prolongation of the disease-free interval in surgically treated rectal carcinoma. N Engl J Med. 1985;312(23):1465–1472.CrossRefGoogle Scholar
- 2.Tveit KM, Guldvog I, Hagen S, et al. Randomized controlled trial of postoperative radiotherapy and short-term time-scheduled 5-fluorouracil against surgery alone in the treatment of Dukes B and C rectal cancer. Norwegian Adjuvant Rectal Cancer Project Group. Br J Surg. 1997;84(8):1130–1135.PubMedCrossRefGoogle Scholar
- 3.Wolmark N, Wieand HS, Hyams DM, et al. Randomized trial of postoperative adjuvant chemotherapy with or without radiotherapy for carcinoma of the rectum: National Surgical Adjuvant Breast and Bowel Project Protocol R-02. J Natl Cancer Inst. 2000;92(5):388–396.PubMedCrossRefGoogle Scholar
- 4.Cafiero F, Gipponi M, Lionetto R, P.A.R. Cooperative Study Group. Randomized clinical trial of adjuvant postoperative RT vs. sequential postoperative ER plus 5-FU and levamisole in patients with stage II-III resectable rectal cancer: a final report. J Surg Oncol. 2003;83(3):140–146.PubMedCrossRefGoogle Scholar
- 5.Krook JE, Moertel CG, Gunderson LL, et al. Effective surgical adjuvant therapy for high-risk rectal carcinoma. N Engl J Med. 1991;324(11):709–715.PubMedCrossRefGoogle Scholar
- 6.NIH consensus conference. Adjuvant therapy for patients with colon and rectal cancer. JAMA. 1990;264(11):1444–1450.CrossRefGoogle Scholar
- 7.Gastrointestinal Tumor Study Group. Radiation therapy and fluorouracil with or without semustine for the treatment of patients with surgical adjuvant adenocarcinoma of the rectum. J Clin Oncol. 1992;10(4):549–557.Google Scholar
- 8.O’Connell MJ, Martenson JA, Wieand HS, et al. Improving adjuvant therapy for rectal cancer by combining protracted-infusion fluorouracil with radiation therapy after curative surgery. N Engl J Med. 1994;331(8):502–507.PubMedCrossRefGoogle Scholar
- 9.Smalley SR, Benedetti JK, Williamson SK, et al. Phase III trial of fluorouracil-based chemotherapy regimens plus radiotherapy in postoperative adjuvant rectal cancer: GI INT 0144. J Clin Oncol. 2006;24(22):3542–3547.PubMedCrossRefGoogle Scholar
- 10.Tepper JE, O’Connell M, Niedzwiecki D, et al. Adjuvant therapy in rectal cancer: analysis of stage, sex, and local control–final report of intergroup 0114. J Clin Oncol. 2002;20(7):1744–1750.PubMedCrossRefGoogle Scholar
- 11.Lee JH, Lee JH, Ahn JH, et al. Randomized trial of postoperative adjuvant therapy in stage II and III rectal cancer to define the optimal sequence of chemotherapy and radiotherapy: a preliminary report. J Clin Oncol. 2002;20(7):1751–1758.PubMedCrossRefGoogle Scholar
- 12.MERCURY Study Group. Diagnostic accuracy of preoperative magnetic resonance imaging in predicting curative resection of rectal cancer: prospective observational study. BMJ. 2006;333(7572):779.CrossRefGoogle Scholar
- 13.Swedish Rectal Cancer Trial. Improved survival with preoperative radiotherapy in resectable rectal cancer. N Engl J Med. 1997;336(14):980–987.CrossRefGoogle Scholar
- 14.Camma C, Giunta M, Fiorica F, Pagliaro L, Craxi A, Cottone M. Preoperative radiotherapy for resectable rectal cancer: a meta-analysis. JAMA. 2000;284(8):1008–1015.PubMedCrossRefGoogle Scholar
- 15.Colorectal Cancer Collaborative Group. Adjuvant radiotherapy for rectal cancer: a systematic overview of 8507 patients from 22 randomised trials. Lancet. 2001;358(9290):1291–1304.CrossRefGoogle Scholar
- 16.Glimelius B, Gronberg H, Jarhult J, Wallgren A, Cavallin-Stahl E. A systematic overview of radiation therapy effects in rectal cancer. Acta Oncol. 2003;42(5-6):476–492.PubMedCrossRefGoogle Scholar
- 17.Frykholm GJ, Glimelius B, Pahlman L. Preoperative or postoperative irradiation in adenocarcinoma of the rectum: final treatment results of a randomized trial and an evaluation of late secondary effects. Dis Colon Rectum. 1993;36(6):564–572.PubMedCrossRefGoogle Scholar
- 18.Sauer R, Becker H, Hohenberger W, et al. Preoperative versus postoperative chemoradiotherapy for rectal cancer. N Engl J Med. 2004;351(17):1731–1740.PubMedCrossRefGoogle Scholar
- 19.Sebag-Montefiore D, Steele R, Quirke P, et al. Routine short course pre-op radiotherapy or selective post-op chemoradiotherapy for resectable rectal cancer? Preliminary results of the MRC CR07 randomised trial. J Clin Oncol. 2006;24:abstr 3511.Google Scholar
- 20.Minsky BD, Cohen AM, Kemeny N, et al. Enhancement of radiation-induced downstaging of rectal cancer by fluorouracil and high-dose leucovorin chemotherapy. J Clin Oncol. 1992;10(1):79–84.PubMedGoogle Scholar
- 21.Braendengen M, Tveit KM, Berglund A, et al. Randomized phase III study comparing preoperative radiotherapy with chemoradiotherapy in nonresectable rectal cancer. J Clin Oncol. 2008;26(22):3687–3694.PubMedCrossRefGoogle Scholar
- 22.Bujko K, Nowacki MP, Nasierowska-Guttmejer A, et al. Sphincter preservation following preoperative radiotherapy for rectal cancer: report of a randomised trial comparing short-term radiotherapy vs. conventionally fractionated radiochemotherapy. Radiother Oncol. 2004;72(1):15–24.PubMedCrossRefGoogle Scholar
- 23.Bujko K, Nowacki MP, Nasierowska-Guttmejer A, Michalski W, Bebenek M, Kryj M. Long-term results of a randomized trial comparing preoperative short-course radiotherapy with preoperative conventionally fractionated chemoradiation for rectal cancer. Br J Surg. 2006;93(10):1215–1223.PubMedCrossRefGoogle Scholar
- 24.Bosset JF, Collette L, Calais G, et al. Chemotherapy with preoperative radiotherapy in rectal cancer. N Engl J Med. 2006;355(11):1114–1123.PubMedCrossRefGoogle Scholar
- 25.Gerard JP, Conroy T, Bonnetain F, et al. Preoperative radiotherapy with or without concurrent fluorouracil and leucovorin in T3-4 rectal cancers: results of FFCD 9203. J Clin Oncol. 2006;24(28):4620–4625.PubMedCrossRefGoogle Scholar
- 26.Collette L, Bosset JF, den Dulk M, et al. Patients with curative resection of cT3-4 rectal cancer after preoperative radiotherapy or radiochemotherapy: does anybody benefit from adjuvant fluorouracil-based chemotherapy? A trial of the European Organisation for Research and Treatment of Cancer Radiation Oncology Group. J Clin Oncol. 2007;25(28):4379–4386.PubMedCrossRefGoogle Scholar
- 27.Rodel C, Sauer R. Integration of novel agents into combined-modality treatment for rectal cancer patients. Strahlenther Onkol. 2007;183(5):227–235.PubMedCrossRefGoogle Scholar
- 28.Chau I, Brown G, Cunningham D, et al. Neoadjuvant capecitabine and oxaliplatin followed by synchronous chemoradiation and total mesorectal excision in magnetic resonance imaging-defined poor-risk rectal cancer. J Clin Oncol. 2006;24(4):668–674.PubMedCrossRefGoogle Scholar
- 29.Habr-Gama A, Perez RO, Proscurshim I, et al. Patterns of failure and survival for nonoperative treatment of stage c0 distal rectal cancer following neoadjuvant chemoradiation therapy. J Gastrointest Surg. 2006;10(10):1319–1329.PubMedCrossRefGoogle Scholar
- 30.Willett CG, Boucher Y, di Tomaso E, et al. Direct evidence that the VEGF-specific antibody bevacizumab has antivascular effects in human rectal cancer. Nat Med. 2004;10(2):145–147.PubMedCrossRefGoogle Scholar
- 31.Rodel C, Arnold D, Hipp M, et al. Phase I-II trial of cetuximab, capecitabine, oxaliplatin, and radiotherapy as preoperative treatment in rectal cancer. Int J Radiat Oncol Biol Phys. 2008;70(4):1081–1086.PubMedCrossRefGoogle Scholar